Problem with wireless headphones (the microphone works, but the audio is not heard)

Support Sound
1

Hi,

I recently bought some wireless headphones on Amazon from the BINNUNE brand, they had a good rating from users and in the product information it says that it works on Linux. I have tested them on Windows and they work fine.

In Linux, when plugging in the USB dongle, the system detects it fine (I’m using KDE). If I go to the audio configuration, I see that the system has detected it correctly, both for output to listen to audio, and for input with the microphone.

The problem is that the audio is not heard. The microphone does work correctly, I have opened Audacity, I have recorded audio speaking through the microphone of the headset, and I could see perfectly how the waves were drawing as I spoke. But as I say, nothing is heard through the headphones.

I have tried to do what is said on this page:

But it hasn’t worked for me. I’ve also tried uninstalling PulseAudio and installing PipeWire, and that didn’t work either.

Does anyone have any idea what is going on and how to fix this problem?

Regards.

2

Run alsamixer and check if your headphones are muted.

3

I have tried with alsamixer but on none of the devices, neither the sound card nor the headphones, it shows any mute option in the ones shown below. But one thing caught my attention, even though I have uninstalled PipeWire and reinstalled PulseAudio, when I enter the alsamixer application I get this:

image
image914×557 23.9 KB

4

I suggest you install pulseaudio-alsa to replace pipewire-alsa to ensure PulseAudio is set as default ALSA Output

Use this command to get information about ALSA audio settings in text format

  alsa-info.sh --with-amixer --stdout
5

In alsamixer and pulsemixer, the headphones are detected correctly, as well as in the KDE settings panel:

image
image1041×683 32.8 KB

image
image1041×683 35.5 KB

image
image1150×859 116 KB

But as I say, the audio is not heard, it is not even heard when performing the KDE sound test in the audio settings panel.

6

I paste here the result of the command (the headphones are the BW02BT’/'Realtek BW02/BT):

ALSA Information Script v 0.5.3
--------------------------------

This script visits the following commands/files to collect diagnostic
information about your ALSA installation and sound related hardware.

  dmesg
  lspci
  aplay
  amixer
  alsactl
  rpm, dpkg
  /proc/asound/
  /sys/class/sound/
  ~/.asoundrc (etc.)

See '/usr/bin/alsa-info.sh --help' for command line options.

upload=true&script=true&cardinfo=
!!################################
!!ALSA Information Script v 0.5.3
!!################################

!!Script ran on: Tue Aug  8 16:38:56 UTC 2023


!!Linux Distribution
!!------------------

ID_LIKE=arch


!!DMI Information
!!---------------

Manufacturer:      Micro Computer (HK) Tech Limited
Product Name:      UM580
Product Version:   Default string
Firmware Version:  5.07
System SKU:        Default string
Board Vendor:      Shenzhen Meigao Electronic Equipment Co.,Ltd
Board Name:        F6BFC


!!ACPI Device Status Information
!!---------------

/sys/bus/acpi/devices/AMDI0030:00/status 	 15
/sys/bus/acpi/devices/CPLM3218:02/status 	 15
/sys/bus/acpi/devices/LNXPOWER:00/status 	 1
/sys/bus/acpi/devices/LNXPOWER:01/status 	 1
/sys/bus/acpi/devices/LNXVIDEO:00/status 	 15
/sys/bus/acpi/devices/MSFT0101:00/status 	 15
/sys/bus/acpi/devices/NXP8013:02/status 	 15
/sys/bus/acpi/devices/PNP0103:00/status 	 15
/sys/bus/acpi/devices/PNP0501:00/status 	 15
/sys/bus/acpi/devices/PNP0A08:00/status 	 15
/sys/bus/acpi/devices/PNP0C01:00/status 	 15
/sys/bus/acpi/devices/PNP0C02:01/status 	 15
/sys/bus/acpi/devices/PNP0C02:03/status 	 15
/sys/bus/acpi/devices/PNP0C0C:00/status 	 11
/sys/bus/acpi/devices/PNP0C0F:00/status 	 11
/sys/bus/acpi/devices/PNP0C0F:01/status 	 11
/sys/bus/acpi/devices/PNP0C0F:02/status 	 11
/sys/bus/acpi/devices/PNP0C0F:03/status 	 11
/sys/bus/acpi/devices/PNP0C0F:04/status 	 11
/sys/bus/acpi/devices/PNP0C0F:05/status 	 11
/sys/bus/acpi/devices/PNP0C0F:06/status 	 11
/sys/bus/acpi/devices/PNP0C0F:07/status 	 11
/sys/bus/acpi/devices/PNP0C50:00/status 	 15
/sys/bus/acpi/devices/PNP0C50:06/status 	 15
/sys/bus/acpi/devices/device:34/status 	 11
/sys/bus/acpi/devices/device:35/status 	 11
/sys/bus/acpi/devices/device:36/status 	 11
/sys/bus/acpi/devices/device:37/status 	 11
/sys/bus/acpi/devices/device:38/status 	 11
/sys/bus/acpi/devices/device:39/status 	 11
/sys/bus/acpi/devices/device:3a/status 	 11
/sys/bus/acpi/devices/device:3b/status 	 11
/sys/bus/acpi/devices/device:3c/status 	 11
/sys/bus/acpi/devices/device:3d/status 	 11
/sys/bus/acpi/devices/device:3e/status 	 11


!!Kernel Information
!!------------------

Kernel release:    #1 SMP PREEMPT_DYNAMIC Mon Aug  7 08:05:31 UTC 2023
Operating System:  GNU/Linux
Architecture:      x86_64
Processor:         unknown
SMP Enabled:       Yes


!!ALSA Version
!!------------

Driver version:     k6.5.0-1-MANJARO
Library version:    1.2.9
Utilities version:  1.2.9


!!Loaded ALSA modules
!!-------------------

snd_hda_intel (card 0)
snd_hda_intel (card 1)
snd_usb_audio (card 2)


!!Sound Servers on this system
!!----------------------------

PipeWire:
      Installed - Yes (/usr/bin/pipewire)
      Running - Yes

Pulseaudio:
      Installed - Yes (/usr/bin/pulseaudio)
      Running - Yes

Jack:
      Installed - Yes (/usr/bin/jackd)
      Running - No


!!Soundcards recognised by ALSA
!!-----------------------------

 0 [Generic        ]: HDA-Intel - HD-Audio Generic
                      HD-Audio Generic at 0xfcbc8000 irq 80
 1 [Generic_1      ]: HDA-Intel - HD-Audio Generic
                      HD-Audio Generic at 0xfcbc0000 irq 81
 2 [BW02BT         ]: USB-Audio - BW02/BT
                      Realtek BW02/BT at usb-0000:04:00.3-2.2.4, full speed


!!PCI Soundcards installed in the system
!!--------------------------------------

04:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Renoir Radeon High Definition Audio Controller [1002:1637]
	Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] Renoir Radeon High Definition Audio Controller [1002:1637]
04:00.6 Audio device [0403]: Advanced Micro Devices, Inc. [AMD] Family 17h/19h HD Audio Controller [1022:15e3]
	DeviceName: HD Audio Controller


!!Loaded sound module options
!!---------------------------

!!Module: snd_hda_intel
	align_buffer_size : -1
	bdl_pos_adj : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
	beep_mode : N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N
	ctl_dev_id : N
	dmic_detect : Y
	enable : Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y
	enable_msi : -1
	id : (null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null)
	index : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
	jackpoll_ms : 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
	model : (null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null)
	patch : (null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null)
	pm_blacklist : Y
	position_fix : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
	power_save : 10
	power_save_controller : Y
	probe_mask : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
	probe_only : 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
	single_cmd : -1
	snoop : -1

!!Module: snd_hda_intel
	align_buffer_size : -1
	bdl_pos_adj : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
	beep_mode : N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N
	ctl_dev_id : N
	dmic_detect : Y
	enable : Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y
	enable_msi : -1
	id : (null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null)
	index : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
	jackpoll_ms : 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
	model : (null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null)
	patch : (null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null)
	pm_blacklist : Y
	position_fix : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
	power_save : 10
	power_save_controller : Y
	probe_mask : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
	probe_only : 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
	single_cmd : -1
	snoop : -1

!!Module: snd_usb_audio
	autoclock : Y
	delayed_register : (null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null)
	device_setup : 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
	enable : Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y
	id : (null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null)
	ignore_ctl_error : N
	implicit_fb : N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N
	index : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
	lowlatency : Y
	pid : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
	quirk_alias : (null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null)
	quirk_flags : 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
	skip_validation : N
	use_vmalloc : Y
	vid : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1


!!Sysfs card info
!!---------------

!!Card: /sys/class/sound/card0
Driver: /sys/bus/pci/drivers/snd_hda_intel
Tree:

!!Card: /sys/class/sound/card1
Driver: /sys/bus/pci/drivers/snd_hda_intel
Tree:

!!Card: /sys/class/sound/card2
Driver: /sys/bus/usb/drivers/snd-usb-audio
Tree:


!!HDA-Intel Codec information
!!---------------------------
--startcollapse--

Codec: ATI R6xx HDMI
Address: 0
AFG Function Id: 0x1 (unsol 0)
Vendor Id: 0x1002aa01
Subsystem Id: 0x00aa0100
Revision Id: 0x100700
No Modem Function Group found
Default PCM:
    rates [0x70]: 32000 44100 48000
    bits [0x2]: 16
    formats [0x5]: PCM AC3
Default Amp-In caps: N/A
Default Amp-Out caps: N/A
State of AFG node 0x01:
  Power states:  D0 D3 CLKSTOP EPSS
  Power: setting=D0, actual=D0, Clock-stop-OK
GPIO: io=0, o=0, i=0, unsolicited=0, wake=0
Node 0x02 [Audio Output] wcaps 0x221: Stereo Digital Stripe
  Converter: stream=0, channel=0
  Digital: Enabled
  Digital category: 0x0
  IEC Coding Type: 0x0
Node 0x03 [Pin Complex] wcaps 0x400381: Stereo Digital
  Pincap 0x00000094: OUT Detect HDMI
  Pin Default 0x185600f0: [Jack] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0xf, Sequence = 0x0
  Pin-ctls: 0x40: OUT
  Unsolicited: tag=00, enabled=0
  Connection: 1
     0x02
Node 0x04 [Audio Output] wcaps 0x221: Stereo Digital Stripe
  Device: name="HDMI 1", type="HDMI", device=7
  Converter: stream=1, channel=0
  Digital: Enabled GenLevel
  Digital category: 0x2
  IEC Coding Type: 0x0
Node 0x05 [Pin Complex] wcaps 0x400381: Stereo Digital
  Pincap 0x00000094: OUT Detect HDMI
  Pin Default 0x185600f0: [Jack] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0xf, Sequence = 0x0
  Pin-ctls: 0x40: OUT
  Unsolicited: tag=00, enabled=0
  Connection: 1
     0x04
Node 0x06 [Audio Output] wcaps 0x221: Stereo Digital Stripe
  Converter: stream=0, channel=0
  Digital: Enabled
  Digital category: 0x0
  IEC Coding Type: 0x0
Node 0x07 [Pin Complex] wcaps 0x400381: Stereo Digital
  Pincap 0x00000094: OUT Detect HDMI
  Pin Default 0x185600f0: [Jack] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0xf, Sequence = 0x0
  Pin-ctls: 0x40: OUT
  Unsolicited: tag=00, enabled=0
  Connection: 1
     0x06
Node 0x08 [Audio Output] wcaps 0x221: Stereo Digital Stripe
  Converter: stream=0, channel=0
  Digital: Enabled
  Digital category: 0x0
  IEC Coding Type: 0x0
Node 0x09 [Pin Complex] wcaps 0x400381: Stereo Digital
  Pincap 0x00000094: OUT Detect HDMI
  Pin Default 0x185600f0: [Jack] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0xf, Sequence = 0x0
  Pin-ctls: 0x40: OUT
  Unsolicited: tag=00, enabled=0
  Connection: 1
     0x08
Node 0x0a [Audio Output] wcaps 0x221: Stereo Digital Stripe
  Converter: stream=0, channel=0
  Digital:
  Digital category: 0x0
  IEC Coding Type: 0x0
Node 0x0b [Pin Complex] wcaps 0x400381: Stereo Digital
  Pincap 0x00000094: OUT Detect HDMI
  Pin Default 0x585600f0: [N/A] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0xf, Sequence = 0x0
  Pin-ctls: 0x40: OUT
  Unsolicited: tag=00, enabled=0
  Connection: 1
     0x0a
Node 0x0c [Audio Output] wcaps 0x221: Stereo Digital Stripe
  Converter: stream=0, channel=0
  Digital:
  Digital category: 0x0
  IEC Coding Type: 0x0
Node 0x0d [Pin Complex] wcaps 0x400381: Stereo Digital
  Pincap 0x00000094: OUT Detect HDMI
  Pin Default 0x585600f0: [N/A] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0xf, Sequence = 0x0
  Pin-ctls: 0x40: OUT
  Unsolicited: tag=00, enabled=0
  Connection: 1
     0x0c
Codec: Conexant CX8070
Address: 0
AFG Function Id: 0x1 (unsol 1)
Vendor Id: 0x14f11f86
Subsystem Id: 0x14f10330
Revision Id: 0x100100
No Modem Function Group found
Default PCM:
    rates [0x540]: 48000 96000 192000
    bits [0xa]: 16 24
    formats [0x1]: PCM
Default Amp-In caps: N/A
Default Amp-Out caps: N/A
State of AFG node 0x01:
  Power states:  D0 D1 D2 D3 D3cold S3D3cold CLKSTOP EPSS
  Power: setting=D0, actual=D0
GPIO: io=5, o=0, i=0, unsolicited=1, wake=1
  IO[0]: enable=0, dir=0, wake=0, sticky=0, data=0, unsol=0
  IO[1]: enable=0, dir=0, wake=0, sticky=0, data=0, unsol=0
  IO[2]: enable=0, dir=0, wake=0, sticky=0, data=0, unsol=0
  IO[3]: enable=0, dir=0, wake=0, sticky=0, data=0, unsol=0
  IO[4]: enable=0, dir=0, wake=0, sticky=0, data=0, unsol=0
Node 0x10 [Audio Output] wcaps 0xc1d: Stereo Amp-Out R/L
  Control: name="Master Playback Volume", index=0, device=0
    ControlAmp: chs=3, dir=Out, idx=0, ofs=0
  Control: name="Master Playback Switch", index=0, device=0
    ControlAmp: chs=3, dir=Out, idx=0, ofs=0
  Device: name="CX8070 Analog", type="Audio", device=0
  Amp-Out caps: ofs=0x4a, nsteps=0x4a, stepsize=0x03, mute=1
  Amp-Out vals:  [0x36 0x36]
  Converter: stream=5, channel=0
  PCM:
    rates [0x540]: 48000 96000 192000
    bits [0xa]: 16 24
    formats [0x1]: PCM
  Power states:  D0 D1 D2 D3 EPSS
  Power: setting=D0, actual=D0
Node 0x11 [Audio Output] wcaps 0xc1d: Stereo Amp-Out R/L
  Amp-Out caps: ofs=0x4a, nsteps=0x4a, stepsize=0x03, mute=1
  Amp-Out vals:  [0x4a 0x4a]
  Converter: stream=0, channel=0
  PCM:
    rates [0x540]: 48000 96000 192000
    bits [0xa]: 16 24
    formats [0x1]: PCM
  Power states:  D0 D1 D2 D3 EPSS
  Power: setting=D0, actual=D0
Node 0x12 [Beep Generator Widget] wcaps 0x70000c: Mono Amp-Out
  Control: name="Beep Playback Volume", index=0, device=0
    ControlAmp: chs=1, dir=Out, idx=0, ofs=0
  Control: name="Beep Playback Switch", index=0, device=0
    ControlAmp: chs=1, dir=Out, idx=0, ofs=0
  Amp-Out caps: ofs=0x07, nsteps=0x07, stepsize=0x0f, mute=0
  Amp-Out vals:  [0x03]
Node 0x13 [Audio Input] wcaps 0x100d1b: Stereo Amp-In R/L
  Control: name="Capture Volume", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=1, ofs=0
  Control: name="Capture Switch", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=1, ofs=0
  Device: name="CX8070 Analog", type="Audio", device=0
  Amp-In caps: ofs=0x4a, nsteps=0x50, stepsize=0x03, mute=1
  Amp-In vals:  [0x80 0x80] [0xd0 0xd0] [0xd0 0xd0] [0x80 0x80]
  Converter: stream=1, channel=0
  SDI-Select: 0
  PCM:
    rates [0x540]: 48000 96000 192000
    bits [0xa]: 16 24
    formats [0x1]: PCM
  Power states:  D0 D1 D2 D3 EPSS
  Power: setting=D0, actual=D0
  Connection: 4
     0x18 0x19 0x1a* 0x15
Node 0x14 [Audio Input] wcaps 0x100d1b: Stereo Amp-In R/L
  Amp-In caps: ofs=0x4a, nsteps=0x50, stepsize=0x03, mute=1
  Amp-In vals:  [0x4a 0x4a] [0x4a 0x4a]
  Converter: stream=0, channel=0
  SDI-Select: 0
  PCM:
    rates [0x540]: 48000 96000 192000
    bits [0xa]: 16 24
    formats [0x1]: PCM
  Power states:  D0 D1 D2 D3 EPSS
  Power: setting=D0, actual=D0
  Connection: 2
     0x1a* 0x15
Node 0x15 [Vendor Defined Widget] wcaps 0xf0050b: Stereo Amp-In
  Amp-In caps: ofs=0x4a, nsteps=0x4a, stepsize=0x03, mute=1
  Amp-In vals:  [0x4a 0x4a] [0x4a 0x4a]
  Power states:  D0 D1 D2 D3 EPSS
  Power: setting=D0, actual=D0
  Connection: 2
     0x10* 0x11
Node 0x16 [Pin Complex] wcaps 0x400581: Stereo
  Pincap 0x0001001c: OUT HP EAPD Detect
  EAPD 0x2: EAPD
  Pin Default 0x04214040: [Jack] HP Out at Ext Right
    Conn = 1/8, Color = Green
    DefAssociation = 0x4, Sequence = 0x0
  Pin-ctls: 0xc0: OUT HP
  Unsolicited: tag=03, enabled=1
  Power states:  D0 D1 D2 D3 EPSS
  Power: setting=D0, actual=D0
  Connection: 2
     0x10* 0x11
Node 0x17 [Pin Complex] wcaps 0x400501: Stereo
  Pincap 0x00010010: OUT EAPD
  EAPD 0x2: EAPD
  Pin Default 0x40f001f0: [N/A] Other at Ext N/A
    Conn = Unknown, Color = Unknown
    DefAssociation = 0xf, Sequence = 0x0
    Misc = NO_PRESENCE
  Pin-ctls: 0x40: OUT
  Power states:  D0 D1 D2 D3 EPSS
  Power: setting=D0, actual=D0
  Connection: 2
     0x10* 0x11
Node 0x18 [Pin Complex] wcaps 0x40048b: Stereo Amp-In
  Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x2f, mute=0
  Amp-In vals:  [0x00 0x00]
  Pincap 0x00001324: IN Detect
    Vref caps: HIZ 50 80
  Pin Default 0x40f001f0: [N/A] Other at Ext N/A
    Conn = Unknown, Color = Unknown
    DefAssociation = 0xf, Sequence = 0x0
    Misc = NO_PRESENCE
  Pin-ctls: 0x00: VREF_HIZ
  Unsolicited: tag=00, enabled=0
  Power states:  D0 D1 D2 D3 EPSS
  Power: setting=D0, actual=D0
Node 0x19 [Pin Complex] wcaps 0x40048b: Stereo Amp-In
  Control: name="Mic Boost Volume", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=0, ofs=0
  Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x2f, mute=0
  Amp-In vals:  [0x00 0x00]
  Pincap 0x00001324: IN Detect
    Vref caps: HIZ 50 80
  Pin Default 0x04a19020: [Jack] Mic at Ext Right
    Conn = 1/8, Color = Pink
    DefAssociation = 0x2, Sequence = 0x0
  Pin-ctls: 0x24: IN VREF_80
  Unsolicited: tag=01, enabled=1
  Power states:  D0 D1 D2 D3 EPSS
  Power: setting=D0, actual=D0
Node 0x1a [Pin Complex] wcaps 0x40048b: Stereo Amp-In
  Control: name="Internal Mic Boost Volume", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=0, ofs=0
  Amp-In caps: ofs=0x00, nsteps=0x03, stepsize=0x2f, mute=0
  Amp-In vals:  [0x03 0x03]
  Pincap 0x00000024: IN Detect
  Pin Default 0x90a72150: [Fixed] Mic at Int N/A
    Conn = Analog, Color = Grey
    DefAssociation = 0x5, Sequence = 0x0
    Misc = NO_PRESENCE
  Pin-ctls: 0x20: IN
  Unsolicited: tag=00, enabled=0
  Power states:  D0 D1 D2 D3 EPSS
  Power: setting=D0, actual=D0
Node 0x1b [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x1c [Vendor Defined Widget] wcaps 0xf00000: Mono
Node 0x1d [Vendor Defined Widget] wcaps 0xf0058b: Stereo Amp-In
  Amp-In caps: N/A
  Amp-In vals: 
  Unsolicited: tag=00, enabled=0
  Power states: 
  Power: setting=D0, actual=D0
  Connection: 0
Node 0x1e [Vendor Defined Widget] wcaps 0xf0058b: Stereo Amp-In
  Amp-In caps: N/A
  Amp-In vals: 
  Unsolicited: tag=00, enabled=0
  Power states: 
  Power: setting=D0, actual=D0
  Connection: 0
Node 0x1f [Vendor Defined Widget] wcaps 0xf0058b: Stereo Amp-In
  Amp-In caps: N/A
  Amp-In vals: 
  Unsolicited: tag=00, enabled=0
  Power states: 
  Power: setting=D0, actual=D0
  Connection: 0
Node 0x20 [Audio Output] wcaps 0x611: Stereo Digital
  Converter: stream=0, channel=0
  Digital:
  Digital category: 0x0
  IEC Coding Type: 0x0
  PCM:
    rates [0x540]: 48000 96000 192000
    bits [0xe]: 16 20 24
    formats [0x5]: PCM AC3
  Power states:  D0 D1 D2 D3 EPSS
  Power: setting=D0, actual=D0
Node 0x21 [Pin Complex] wcaps 0x400701: Stereo Digital
  Pincap 0x00000010: OUT
  Pin Default 0x40f001f0: [N/A] Other at Ext N/A
    Conn = Unknown, Color = Unknown
    DefAssociation = 0xf, Sequence = 0x0
    Misc = NO_PRESENCE
  Pin-ctls: 0x00:
  Power states:  D0 D1 D2 D3 EPSS
  Power: setting=D0, actual=D0
  Connection: 1
     0x20
--endcollapse--


!!USB Descriptors
!!---------------
--startcollapse--

Bus 001 Device 022: ID 0bda:875b Realtek Semiconductor Corp. BW02/BT
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x0bda Realtek Semiconductor Corp.
  idProduct          0x875b 
  bcdDevice            0.00
  iManufacturer           1 Realtek
  iProduct                2 BW02/BT
  iSerial                 3 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength       0x00e9
    bNumInterfaces          4
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              100mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass         1 Audio
      bInterfaceSubClass      1 Control Device
      bInterfaceProtocol      0 
      iInterface              0 
      AudioControl Interface Descriptor:
        bLength                10
        bDescriptorType        36
        bDescriptorSubtype      1 (HEADER)
        bcdADC               1.00
        wTotalLength       0x004a
        bInCollection           2
        baInterfaceNr(0)        1
        baInterfaceNr(1)        2
      AudioControl Interface Descriptor:
        bLength                12
        bDescriptorType        36
        bDescriptorSubtype      2 (INPUT_TERMINAL)
        bTerminalID             1
        wTerminalType      0x0201 Microphone
        bAssocTerminal          0
        bNrChannels             1
        wChannelConfig     0x0001
          Left Front (L)
        iChannelNames           0 
        iTerminal               0 
      AudioControl Interface Descriptor:
        bLength                12
        bDescriptorType        36
        bDescriptorSubtype      2 (INPUT_TERMINAL)
        bTerminalID             3
        wTerminalType      0x0101 USB Streaming
        bAssocTerminal          0
        bNrChannels             2
        wChannelConfig     0x0003
          Left Front (L)
          Right Front (R)
        iChannelNames           0 
        iTerminal               0 
      AudioControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      3 (OUTPUT_TERMINAL)
        bTerminalID             6
        wTerminalType      0x0302 Headphones
        bAssocTerminal          0
        bSourceID               9
        iTerminal               0 
      AudioControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      3 (OUTPUT_TERMINAL)
        bTerminalID             5
        wTerminalType      0x0101 USB Streaming
        bAssocTerminal          0
        bSourceID              10
        iTerminal               0 
      AudioControl Interface Descriptor:
        bLength                13
        bDescriptorType        36
        bDescriptorSubtype      6 (FEATURE_UNIT)
        bUnitID                 9
        bSourceID               3
        bControlSize            2
        bmaControls(0)     0x0003
          Mute Control
          Volume Control
        bmaControls(1)     0x0000
        bmaControls(2)     0x0000
        iFeature                0 
      AudioControl Interface Descriptor:
        bLength                 9
        bDescriptorType        36
        bDescriptorSubtype      6 (FEATURE_UNIT)
        bUnitID                10
        bSourceID               1
        bControlSize            1
        bmaControls(0)       0x03
          Mute Control
          Volume Control
        bmaControls(1)       0x00
        iFeature                0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       1
      bNumEndpoints           1
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      AudioStreaming Interface Descriptor:
        bLength                 7
        bDescriptorType        36
        bDescriptorSubtype      1 (AS_GENERAL)
        bTerminalLink           3
        bDelay                  1 frames
        wFormatTag         0x0001 PCM
      AudioStreaming Interface Descriptor:
        bLength                17
        bDescriptorType        36
        bDescriptorSubtype      2 (FORMAT_TYPE)
        bFormatType             1 (FORMAT_TYPE_I)
        bNrChannels             2
        bSubframeSize           2
        bBitResolution         16
        bSamFreqType            1 Discrete
        tSamFreq[ 0]        48000
        junk at descriptor end: 00 00 00 00 00 00
      Endpoint Descriptor:
        bLength                 9
        bDescriptorType         5
        bEndpointAddress     0x03  EP 3 OUT
        bmAttributes            9
          Transfer Type            Isochronous
          Synch Type               Adaptive
          Usage Type               Data
        wMaxPacketSize     0x0240  1x 576 bytes
        bInterval               1
        bRefresh                0
        bSynchAddress           0
        AudioStreaming Endpoint Descriptor:
          bLength                 7
          bDescriptorType        37
          bDescriptorSubtype      1 (EP_GENERAL)
          bmAttributes         0x01
            Sampling Frequency
          bLockDelayUnits         1 Milliseconds
          wLockDelay         0x0001
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       1
      bNumEndpoints           1
      bInterfaceClass         1 Audio
      bInterfaceSubClass      2 Streaming
      bInterfaceProtocol      0 
      iInterface              0 
      AudioStreaming Interface Descriptor:
        bLength                 7
        bDescriptorType        36
        bDescriptorSubtype      1 (AS_GENERAL)
        bTerminalLink           5
        bDelay                  1 frames
        wFormatTag         0x0001 PCM
      AudioStreaming Interface Descriptor:
        bLength                17
        bDescriptorType        36
        bDescriptorSubtype      2 (FORMAT_TYPE)
        bFormatType             1 (FORMAT_TYPE_I)
        bNrChannels             1
        bSubframeSize           2
        bBitResolution         16
        bSamFreqType            1 Discrete
        tSamFreq[ 0]        48000
        junk at descriptor end: 00 00 00 00 00 00
      Endpoint Descriptor:
        bLength                 9
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes           13
          Transfer Type            Isochronous
          Synch Type               Synchronous
          Usage Type               Data
        wMaxPacketSize     0x0064  1x 100 bytes
        bInterval               1
        bRefresh                0
        bSynchAddress           0
        AudioStreaming Endpoint Descriptor:
          bLength                 7
          bDescriptorType        37
          bDescriptorSubtype      1 (EP_GENERAL)
          bmAttributes         0x01
            Sampling Frequency
          bLockDelayUnits         0 Undefined
          wLockDelay         0x0000
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        3
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         3 Human Interface Device
      bInterfaceSubClass      0 
      bInterfaceProtocol      0 
      iInterface              0 
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.00
          bCountryCode            0 Not supported
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength     174
         Report Descriptors: 
           ** UNAVAILABLE **
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               2
--endcollapse--


!!USB Stream information
!!----------------------
--startcollapse--

Realtek BW02/BT at usb-0000:04:00.3-2.2.4, full speed : USB Audio

Playback:
  Status: Running
    Interface = 1
    Altset = 1
    Packet Size = 288
    Momentary freq = 48000 Hz (0x30.0000)
  Interface 1
    Altset 1
    Format: S16_LE
    Channels: 2
    Endpoint: 0x03 (3 OUT) (ADAPTIVE)
    Rates: 48000
    Bits: 16
    Channel map: FL FR

Capture:
  Status: Running
    Interface = 2
    Altset = 1
    Packet Size = 100
    Momentary freq = 48000 Hz (0x30.0000)
  Interface 2
    Altset 1
    Format: S16_LE
    Channels: 1
    Endpoint: 0x83 (3 IN) (SYNC)
    Rates: 48000
    Bits: 16
    Channel map: MONO
--endcollapse--


!!USB Mixer information
!!---------------------
--startcollapse--

USB Mixer: usb_id=0x0bda875b, ctrlif=0, ctlerr=0
Card: Realtek BW02/BT at usb-0000:04:00.3-2.2.4, full speed
  Unit: 9
    Control: name="PCM Playback Volume", index=0
    Info: id=9, control=2, cmask=0x0, channels=1, type="S16"
    Volume: min=2, max=129, dBmin=0, dBmax=50
  Unit: 9
    Control: name="PCM Playback Switch", index=0
    Info: id=9, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
    Volume: min=0, max=1, dBmin=0, dBmax=0
  Unit: 10
    Control: name="Mic Capture Volume", index=0
    Info: id=10, control=2, cmask=0x0, channels=1, type="S16"
    Volume: min=-3072, max=1792, dBmin=-1200, dBmax=700
  Unit: 10
    Control: name="Mic Capture Switch", index=0
    Info: id=10, control=1, cmask=0x0, channels=1, type="INV_BOOLEAN"
    Volume: min=0, max=1, dBmin=0, dBmax=0
--endcollapse--


!!Amixer output
!!-------------

!!-------Mixer controls for card Generic

Card sysdefault:0 'Generic'/'HD-Audio Generic at 0xfcbc8000 irq 80'
  Mixer name	: 'ATI R6xx HDMI'
  Components	: 'HDA:1002aa01,00aa0100,00100700'
  Controls      : 29
  Simple ctrls  : 5
Simple mixer control 'PCM',0
  Capabilities: pvolume
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 255
  Mono:
  Front Left: Playback 255 [100%] [0.00dB]
  Front Right: Playback 255 [100%] [0.00dB]
Simple mixer control 'IEC958',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'IEC958',1
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'IEC958',2
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'IEC958',3
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]

!!-------Mixer controls for card Generic_1

Card sysdefault:1 'Generic_1'/'HD-Audio Generic at 0xfcbc0000 irq 81'
  Mixer name	: 'Conexant CX8070'
  Components	: 'HDA:14f11f86,14f10330,00100100'
  Controls      : 14
  Simple ctrls  : 6
Simple mixer control 'Master',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 74
  Mono:
  Front Left: Playback 54 [73%] [-20.00dB] [on]
  Front Right: Playback 54 [73%] [-20.00dB] [on]
Simple mixer control 'PCM',0
  Capabilities: pvolume
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 255
  Mono:
  Front Left: Playback 255 [100%] [0.00dB]
  Front Right: Playback 255 [100%] [0.00dB]
Simple mixer control 'Mic Boost',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 3
  Front Left: 0 [0%] [0.00dB]
  Front Right: 0 [0%] [0.00dB]
Simple mixer control 'Beep',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined
  Playback channels: Mono
  Limits: Playback 0 - 7
  Mono: Playback 3 [43%] [-16.00dB] [on]
Simple mixer control 'Capture',0
  Capabilities: cvolume cswitch
  Capture channels: Front Left - Front Right
  Limits: Capture 0 - 80
  Front Left: Capture 80 [100%] [6.00dB] [off]
  Front Right: Capture 80 [100%] [6.00dB] [off]
Simple mixer control 'Internal Mic Boost',0
  Capabilities: volume
  Playback channels: Front Left - Front Right
  Capture channels: Front Left - Front Right
  Limits: 0 - 3
  Front Left: 3 [100%] [36.00dB]
  Front Right: 3 [100%] [36.00dB]

!!-------Mixer controls for card BW02BT

Card sysdefault:2 'BW02BT'/'Realtek BW02/BT at usb-0000:04:00.3-2.2.4, full speed'
  Mixer name	: 'USB Mixer'
  Components	: 'USB0bda:875b'
  Controls      : 6
  Simple ctrls  : 2
Simple mixer control 'PCM',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined
  Playback channels: Mono
  Limits: Playback 0 - 127
  Mono: Playback 0 [0%] [0.00dB] [on]
Simple mixer control 'Mic',0
  Capabilities: cvolume cvolume-joined cswitch cswitch-joined
  Capture channels: Mono
  Limits: Capture 0 - 4864
  Mono: Capture 4864 [100%] [7.00dB] [on]
7

ALSA mixer control PCM for audio playback to headphones is unmuted, but audio level is set to 0

!!-------Mixer controls for card BW02BT

Card sysdefault:2 'BW02BT'/'Realtek BW02/BT at usb-0000:04:00.3-2.2.4, full speed'

Simple mixer control 'PCM',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined
  Playback channels: Mono
  Limits: Playback 0 - 127
  Mono: Playback 0 [0%] [0.00dB] [on]

To access alsamixer control for headphones to increase audio level:

alsamixer --card=BWO2BT

When audio is set to suitable level, save changes to ALSA settings:

sudo alsactl store BWO2BT
8

Thank you so much! This has worked!

But now I have another problem: if I lower the volume a bit in the KDE control panel or in PulseAudio Volume Control, the moment it goes below 100% volume, the audio stops. If I raise it again to 100% or more, it is heard, but as I say, if it goes below 100%, the sound automatically stops being heard.

9

Please post more information about audio devices detected in PulseAudio/PipeWire

pactl list cards; pactl list sinks
10

Here the information requested:

Card #0
        Name: alsa_card.pci-0000_04_00.1
        Driver: module-alsa-card.c
        Owner Module: 6
        Properties:
                alsa.card = "0"
                alsa.card_name = "HD-Audio Generic"
                alsa.long_card_name = "HD-Audio Generic at 0xfcbc8000 irq 80"
                alsa.driver_name = "snd_hda_intel"
                device.bus_path = "pci-0000:04:00.1"
                sysfs.path = "/devices/pci0000:00/0000:00:08.1/0000:04:00.1/sound/card0"
                device.bus = "pci"
                device.vendor.id = "1002"
                device.vendor.name = "Advanced Micro Devices, Inc. [AMD/ATI]"
                device.product.id = "1637"
                device.product.name = "Renoir Radeon High Definition Audio Controller"
                device.string = "0"
                device.description = "Renoir Radeon High Definition Audio Controller"
                module-udev-detect.discovered = "1"
                device.icon_name = "audio-card-pci"
        Profiles:
                output:hdmi-stereo: Digital Stereo (HDMI) Output (sinks: 1, sources: 0, priority: 5900, available: no)
                output:hdmi-surround: Digital Surround 5.1 (HDMI) Output (sinks: 1, sources: 0, priority: 800, available: no)
                output:hdmi-surround71: Digital Surround 7.1 (HDMI) Output (sinks: 1, sources: 0, priority: 800, available: no)
                output:hdmi-stereo-extra1: Digital Stereo (HDMI 2) Output (sinks: 1, sources: 0, priority: 38468, available: yes)
                output:hdmi-stereo-extra2: Digital Stereo (HDMI 3) Output (sinks: 1, sources: 0, priority: 5700, available: no)
                output:hdmi-surround-extra2: Digital Surround 5.1 (HDMI 3) Output (sinks: 1, sources: 0, priority: 600, available: no)
                output:hdmi-surround71-extra2: Digital Surround 7.1 (HDMI 3) Output (sinks: 1, sources: 0, priority: 600, available: no)
                output:hdmi-stereo-extra3: Digital Stereo (HDMI 4) Output (sinks: 1, sources: 0, priority: 5700, available: no)
                output:hdmi-surround-extra3: Digital Surround 5.1 (HDMI 4) Output (sinks: 1, sources: 0, priority: 600, available: no)
                output:hdmi-surround71-extra3: Digital Surround 7.1 (HDMI 4) Output (sinks: 1, sources: 0, priority: 600, available: no)
                off: Off (sinks: 0, sources: 0, priority: 0, available: yes)
        Active Profile: output:hdmi-stereo-extra1
        Ports:
                hdmi-output-0: HDMI / DisplayPort (type: HDMI, priority: 5900, latency offset: 0 usec, not available)
                        Properties:
                                device.icon_name = "video-display"
                        Part of profile(s): output:hdmi-stereo, output:hdmi-surround, output:hdmi-surround71
                hdmi-output-1: HDMI / DisplayPort 2 (type: HDMI, priority: 5800, latency offset: 0 usec, available)
                        Properties:
                                device.icon_name = "video-display"
                                device.product.name = "Mi TV"
                        Part of profile(s): output:hdmi-stereo-extra1
                hdmi-output-2: HDMI / DisplayPort 3 (type: HDMI, priority: 5700, latency offset: 0 usec, not available)
                        Properties:
                                device.icon_name = "video-display"
                        Part of profile(s): output:hdmi-stereo-extra2, output:hdmi-surround-extra2, output:hdmi-surround71-extra2
                hdmi-output-3: HDMI / DisplayPort 4 (type: HDMI, priority: 5600, latency offset: 0 usec, not available)
                        Properties:
                                device.icon_name = "video-display"
                        Part of profile(s): output:hdmi-stereo-extra3, output:hdmi-surround-extra3, output:hdmi-surround71-extra3

Card #1
        Name: alsa_card.usb-Realtek_BW02_BT-00
        Driver: module-alsa-card.c
        Owner Module: 7
        Properties:
                alsa.card = "2"
                alsa.card_name = "BW02/BT"
                alsa.long_card_name = "Realtek BW02/BT at usb-0000:04:00.3-2.2.4, full speed"
                alsa.driver_name = "snd_usb_audio"
                device.bus_path = "pci-0000:04:00.3-usb-0:2.2.4:1.0"
                sysfs.path = "/devices/pci0000:00/0000:00:08.1/0000:04:00.3/usb1/1-2/1-2.2/1-2.2.4/1-2.2.4:1.0/sound/card2"
                udev.id = "usb-Realtek_BW02_BT-00"
                device.bus = "usb"
                device.vendor.id = "0bda"
                device.vendor.name = "Realtek Semiconductor Corp."
                device.product.id = "875b"
                device.product.name = "BW02/BT"
                device.serial = "Realtek_BW02_BT"
                device.string = "2"
                device.description = "BW02/BT"
                module-udev-detect.discovered = "1"
                device.icon_name = "audio-card-usb"
        Profiles:
                input:mono-fallback: Mono Input (sinks: 0, sources: 1, priority: 1, available: yes)
                output:analog-stereo: Analog Stereo Output (sinks: 1, sources: 0, priority: 6500, available: yes)
                output:analog-stereo+input:mono-fallback: Analog Stereo Output + Mono Input (sinks: 1, sources: 1, priority: 6501, available: yes)
                output:iec958-stereo: Digital Stereo (IEC958) Output (sinks: 1, sources: 0, priority: 5500, available: yes)
                output:iec958-stereo+input:mono-fallback: Digital Stereo (IEC958) Output + Mono Input (sinks: 1, sources: 1, priority: 5501, available: yes)
                output:iec958-ac3-surround-51: Digital Surround 5.1 (IEC958/AC3) Output (sinks: 1, sources: 0, priority: 300, available: yes)
                output:iec958-ac3-surround-51+input:mono-fallback: Digital Surround 5.1 (IEC958/AC3) Output + Mono Input (sinks: 1, sources: 1, priority: 301, available: yes)
                off: Off (sinks: 0, sources: 0, priority: 0, available: yes)
        Active Profile: output:analog-stereo+input:mono-fallback
        Ports:
                analog-input-mic: Microphone (type: Mic, priority: 8700, latency offset: 0 usec, availability unknown)
                        Properties:
                                device.icon_name = "audio-input-microphone"
                        Part of profile(s): input:mono-fallback, output:analog-stereo+input:mono-fallback, output:iec958-stereo+input:mono-fallback, output:iec958-ac3-surround-51+input:mono-fallback
                analog-output: Analog Output (type: Analog, priority: 9900, latency offset: 0 usec, availability unknown)
                        Part of profile(s): output:analog-stereo, output:analog-stereo+input:mono-fallback
                iec958-stereo-output: Digital Output (S/PDIF) (type: SPDIF, priority: 0, latency offset: 0 usec, availability unknown)
                        Part of profile(s): output:iec958-stereo, output:iec958-stereo+input:mono-fallback

Card #2
        Name: alsa_card.pci-0000_04_00.6
        Driver: module-alsa-card.c
        Owner Module: 8
        Properties:
                alsa.card = "1"
                alsa.card_name = "HD-Audio Generic"
                alsa.long_card_name = "HD-Audio Generic at 0xfcbc0000 irq 81"
                alsa.driver_name = "snd_hda_intel"
                device.bus_path = "pci-0000:04:00.6"
                sysfs.path = "/devices/pci0000:00/0000:00:08.1/0000:04:00.6/sound/card1"
                device.bus = "pci"
                device.vendor.id = "1022"
                device.vendor.name = "Advanced Micro Devices, Inc. [AMD]"
                device.product.id = "15e3"
                device.product.name = "Family 17h/19h HD Audio Controller"
                device.string = "1"
                device.description = "Family 17h/19h HD Audio Controller"
                module-udev-detect.discovered = "1"
                device.icon_name = "audio-card-pci"
        Profiles:
                input:analog-stereo: Analog Stereo Input (sinks: 0, sources: 1, priority: 32833, available: yes)
                output:analog-stereo: Analog Stereo Output (sinks: 1, sources: 0, priority: 6500, available: no)
                output:analog-stereo+input:analog-stereo: Analog Stereo Duplex (sinks: 1, sources: 1, priority: 6565, available: yes)
                off: Off (sinks: 0, sources: 0, priority: 0, available: yes)
        Active Profile: input:analog-stereo
        Ports:
                analog-input-internal-mic: Internal Microphone (type: Mic, priority: 8900, latency offset: 0 usec, availability unknown)
                        Properties:
                                device.icon_name = "audio-input-microphone"
                        Part of profile(s): input:analog-stereo, output:analog-stereo+input:analog-stereo
                analog-input-mic: Microphone (type: Mic, priority: 8700, latency offset: 0 usec, not available)
                        Properties:
                                device.icon_name = "audio-input-microphone"
                        Part of profile(s): input:analog-stereo, output:analog-stereo+input:analog-stereo
                analog-output-headphones: Headphones (type: Headphones, priority: 9900, latency offset: 0 usec, not available)
                        Properties:
                                device.icon_name = "audio-headphones"
                        Part of profile(s): output:analog-stereo, output:analog-stereo+input:analog-stereo
11

I see that the problem is that when you go down only one unit, for example, go down from 100% to 99%, the volume of the sound is lowered as if it had been lowered to 10%, you only hear the sound a little, and when you go down to 98% can no longer hear anything. It’s as if for every unit you turn down the volume in the KDE control panel or in the PulseAudio Volume Control, it goes down by 85% or 90%, it’s completely out of proportion.

I have done the following test: I have opened alsamixer on a console while a song was playing. In the KDE control panel the volume was at 100%:

image
image1041×683 35.7 KB

When I lower the volume in KDE to 99%, I see that in alsamixer it has been lowered to 48:

image
image1041×683 35.9 KB

And when in KDE I lower it to 98%, in alsamixer it is lowered to 0%:

image
image1041×683 35.4 KB

That is, for each unit of volume that is it goes down in KDE, it goes down 52% in alsamix, that’s why the problem occurs. For some reason, the volume in the KDE audio control panel and the alsamixer volume are out of sync.

12

Previous information from amixer shows that ‘PCM’ control is scaled using integer values 0-127. amixer also shows audio level as a percentage and in decibels

alsamixer screenshots in post #11 show a limited decibel range for the PCM control of 0.0dB to +0.5dB
Audio devices usually show 0.0dB as maximum and level can be reduced by -50.0dB or more

I suggest you install pavucontrol-qt because it shows audio levels in PulseAudio as percentage and decibel values
Check the audio level scaling in Output Devices tab for headset
I also suggest you go to Playback tab and increase/decrease audio level for one audio stream by 0.5 dB to hear how this amount of level change should work

If you want to report more information about audio levels here use terminal commands to get audio levels in text format rather than screenshots:

amixer --card=BWO2BT sget PCM

pactl get-sink-volume alsa_output.usb-Realtek_BW02_BT-00.analog-stereo

IMO the PulseAudio/ALSA level control for the wireless USB device is not fit for purpose.
I suggest you set level to 100% and use other audio controls to adjust audio levels.
Use the volume control on the headphones or adjust levels of Playback Streams in GUI controls.

13

I paste here the results of the commands that you have indicated before:

❯ amixer --card=BW02BT sget PCM
Simple mixer control 'PCM',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined
  Playback channels: Mono
  Limits: Playback 0 - 127
  Mono: Playback 127 [100%] [0.50dB] [on]
❯ pactl get-sink-volume alsa_output.usb-Realtek_BW02_BT-00.analog-stereo
Volume: front-left: 65536 / 100% / 0,00 dB,   front-right: 65536 / 100% / 0,00 dB
        balance 0,00

I have tried with pavucontrol-qt (PulseAudio Volume Control) and the result is the same if the volume is lowered from the Output Devices tab, as soon as it is lowered to 98% nothing is heard anymore.

However, from the Playback tab it does work fine, you can gradually lower the volume for the application that is currently playing audio. Therefore it is a possible workaround, but it is a nuisance because I have to configure the volume for each application without being able to configure it in general for all of them using the system volume…

What is clear is that this is not working well on Linux…

14

The only difference expected from using pavucontrol was for the audio level to be displayed in decibels in addition to percentage values

Terminal commands show a mismatch in decibel levels PulseAudio level from pactl command is 100% / 0,00 dB but ALSA level in amixer is [100%] [0.50dB]

The only way I can think of to get a useable level control in PulseAudio is to add a virtual sink before the output sink

pactl load-module module-null-sink sink_name="headset_volume" sink_properties=device.description="Headset\ Volume"

Set the virtual sink as default for audio playback

pactl set-default-sink headset_volume

And set audio level of sink for USB dongle to 100%

pactl set-sink-volume alsa_output.usb-Realtek_BW02_BT-00.analog-stereo 100%

Then use Audio GUI controls to set Headset Volume to play audio to Analog Output (BW02/BT Analog Stereo) and use Headset Volume control to adjust audio level

15

Sorry, but I don’t know if I’m doing it right.

I have followed the steps that you have indicated and I see that a new virtual device called Headset\Volume has been created in the PulseAudio Volume Control:

image
image896×886 57.2 KB

But when selecting that device in the KDE settings panel as audio output, nothing is heard:

image
image1150×1076 142 KB

16

I am the one that is wrong here
null sink module could be made to work by adding another module, but that is getting too complex for just a volume control
there are other modules that could work, but not simple to implement and maintain

I suggest you reboot system or restart PulseAudio to get rid of the null-sink module

systemctl --user restart pulseaudio

I am going to get another cup off coffee (maybe 2) and think of a simpler plan

back soon…

update: plan B (installing an equalizer) didn’t work, but I have a plan C to test

17

This should work without much additional GUI configuration:

pactl load-module module-remap-sink master=alsa_output.usb-Realtek_BW02_BT-00.analog-stereo channels=2 remix=no

That will create a virtual output device Remapped BW02/BT and the level control should work without changing the BW02/BT output level

If audio playback is not showing in level meters for both outputs, change the audio Playback streams to play to Remapped BW02/BT instead of BW02/BT

18

I am doing something wrong?

image
image1068×724 26.5 KB

19

Check the sink name is correct

pactl list sinks short | cut -f1-2

Add double quotes around the sink name and omit options for channels and remix

pactl load-module module-remap-sink master="alsa_output.usb-Realtek_BW02_BT-00.analog-stereo"
20

OK, after executing the line that you have indicated, this is what I see now in the PulseAudio Volume Control. But modifying the volume level of the Remapped BW02/BT Analog Stereo device does not produce any change in volume, it does nothing:

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image896×886 59.1 KB