Manjaro ISOs includes sof-firmware for Intel laptops with internal digital microphone array
But AMD Audio Coprocessor uses ACP drivers for internal digital microphone array
(currently snd_rn_pci_acp3x)
Dummy Output is created by PulseAudio module-always-sink if there are no audio sinks available for audio playback
If ALSA was detecting audio devices correctly, aplay -l response should look like this:
linux-hardware.org - HP 15s-eq2xxx:aplay
**** List of PLAYBACK Hardware Devices **** card 0: Generic [HD-Audio Generic], device 3: HDMI 0 [HDMI 0] Subdevices: 1/1 Subdevice #0: subdevice #0 card 1: Generic_1 [HD-Audio Generic], device 0: ALC236 Analog [ALC236 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0
Most other hardware scans that share ALSA information show the same devices detected
Error response from aplay -l is probably advising no playback devices detected
Please post more information about ALSA
sudo alsa-info.sh --upload