KDENLIVE - No sound from Project monitoring

Hi Community

when monitoring the project the pictures play correctly with transactions but there is no sound … Why?
-on the timeline Audio is on

  • All the levels are OK (signal level play)
  • the clips (MP3 lime) well render with Mplayer
    Who is the mistake ???
    [philline0@philline0-hplx ~]$ inxi -Fxxxz
System:    Kernel: 5.4.80-2-MANJARO x86_64 bits: 64 compiler: gcc v: 10.2.0 Desktop: KDE Plasma 5.20.4 tk: Qt 5.15.2 
           wm: kwin_x11 dm: SDDM Distro: Manjaro Linux 
Machine:   Type: Laptop System: Hewlett-Packard product: HP Pavilion dv7 Notebook PC v: 058A110000242B10010020100 
           serial: <filter> Chassis: type: 10 serial: <filter> 
           Mobo: Hewlett-Packard model: 1449 v: 65.38 serial: <filter> BIOS: Hewlett-Packard v: F.29 date: 11/07/2011 
Battery:   ID-1: BAT0 charge: 23.8 Wh condition: 23.8/23.8 Wh (100%) volts: 12.4/10.8 model: Hewlett-Packard Primary 
           type: Li-ion serial: N/A status: Full 
CPU:       Info: Quad Core model: Intel Core i7 Q 720 bits: 64 type: MT MCP arch: Nehalem rev: 5 L2 cache: 6144 KiB 
           flags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 25548 
           Speed: 931 MHz min/max: 933/1600 MHz boost: enabled Core speeds (MHz): 1: 931 2: 932 3: 931 4: 931 5: 931 6: 931 
           7: 931 8: 931 
Graphics:  Device-1: Advanced Micro Devices [AMD/ATI] Madison [Mobility Radeon HD 5650/5750 / 6530M/6550M] 
           vendor: Hewlett-Packard driver: radeon v: kernel bus ID: 01:00.0 chip ID: 1002:68c1 
           Device-2: Quanta HP Webcam type: USB driver: uvcvideo bus ID: 2-1.5:5 chip ID: 0408:03b2 
           Display: x11 server: X.Org 1.20.10 compositor: kwin_x11 driver: ati,radeon unloaded: modesetting 
           alternate: fbdev,vesa resolution: 1600x900~60Hz s-dpi: 96 
           OpenGL: renderer: AMD REDWOOD (DRM 2.50.0 / 5.4.80-2-MANJARO LLVM 11.0.0) v: 3.3 Mesa 20.2.3 compat-v: 3.1 
           direct render: Yes 
Audio:     Device-1: Intel 5 Series/3400 Series High Definition Audio vendor: Hewlett-Packard driver: snd_hda_intel v: kernel 
           bus ID: 00:1b.0 chip ID: 8086:3b56 
           Device-2: Advanced Micro Devices [AMD/ATI] Redwood HDMI Audio [Radeon HD 5000 Series] vendor: Hewlett-Packard 
           driver: snd_hda_intel v: kernel bus ID: 01:00.1 chip ID: 1002:aa60 
           Sound Server: ALSA v: k5.4.80-2-MANJARO 
Network:   Device-1: Ralink RT3090 Wireless 802.11n 1T/1R PCIe vendor: Hewlett-Packard driver: rt2800pci v: 2.3.0 port: 4000 
           bus ID: 02:00.0 chip ID: 1814:3090 
           IF: wlo1 state: down mac: <filter> 
           Device-2: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet vendor: Hewlett-Packard driver: r8169 v: kernel 
           port: 2000 bus ID: 03:00.0 chip ID: 10ec:8168 
           IF: enp3s0 state: down mac: <filter> 
           Device-3: Ralink Motorola BC4 Bluetooth 3.0+HS Adapter type: USB driver: btusb bus ID: 1-1.3:4 chip ID: 148f:1000 
           Device-4: TP-Link Archer T3U [Realtek RTL8812BU] type: USB driver: rtl88x2bu bus ID: 2-1.1:3 chip ID: 2357:012d 
           serial: <filter> 
           IF: wlp0s29u1u1 state: up mac: <filter> 
Drives:    Local Storage: total: 238.47 GiB used: 49.36 GiB (20.7%) 
           ID-1: /dev/sda vendor: GOODRAM model: SSDPR-CX400-256 size: 238.47 GiB speed: 3.0 Gb/s serial: <filter> rev: 61.2 
           scheme: MBR 
Partition: ID-1: / size: 225.54 GiB used: 49.36 GiB (21.9%) fs: ext4 dev: /dev/sda1 
Swap:      ID-1: swap-1 type: partition size: 8.32 GiB used: 0 KiB (0.0%) priority: -2 dev: /dev/sda2 
Sensors:   System Temperatures: cpu: 61.0 C mobo: N/A gpu: radeon temp: 65.0 C 
           Fan Speeds (RPM): N/A 
Info:      Processes: 206 Uptime: 13m Memory: 3.78 GiB used: 1.41 GiB (37.2%) Init: systemd v: 246 Compilers: gcc: 10.2.0 
           Packages: 1395 pacman: 1390 flatpak: 5 Shell: Bash v: 5.0.18 running in: konsole inxi: 3.1.08 

[philline0@philline0-hplx ~]$

mod. edited for reasons of better readability

This comes from : The Sound of Plasma - Audio volume has been cut when Kdenlive installed.
Solution is :slightly_smiling_face: only turn ON the sound in Plasma - Audio - Volume parameters - Application / Kdenlive. (from taskbar)
The end !

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