How to play audio wav file and output through USB with headset?

[Ethan58]

Hi,

I am a new starter using STM32MPU257F. 

I plug a headset into a USB port and use the below command to play an audio-only wav file.

gst-play-1.0 audiofile.wav

the output log as below

=======================

[ 240.645711] usb 1-1.2: new full-speed USB device number 3 using ehci-platform
[ 240.864117] input: Synaptics Hi-Res Audio-BY as /devices/platform/soc@0/42080000.rifsc/42080000.rifsc:usb@482e0000/482f0000.usb/us1
[ 240.933975] hid-generic 0003:0572:1B08.0001: input: USB HID v1.11 Device [Synaptics Hi-Res Audio-BY] on usb-482f0000.usb-1.2/input3

root@stm32mp2:~# gst-play-1.0 file_example_WAV_2MG.wav
Press 'k' to see a list of keyboard shortcuts.
Now playing /home/root/file_example_WAV_2MG.wav
WARNING Failed to connect: Connection refused
WARNING debug information: /usr/src/debug/gstreamer1.0-plugins-good/1.22.6-r0/ext/pulse/pulsesink.c(616): gst_pulseringbuffer_open_dee
Redistribute latency...
0:00:11.9 / 0:00:11.9
Reached end of play list.

=======================

but I cannot hear any sound from the headset.

Is it possible to play audio through USB headset microphone?

Are there any settings or configurations required?

I also use the below command:

root@stm32mp2:~# aplay -l
aplay: device_list:274: no soundcards found...

Is it normal "no soundcards found..."?

root@stm32mp2:~# gst-play-1.0 --version
gst-play-1.0 version 1.22.6
GStreamer 1.22.6
Unknown package origin

thanks.

=============================================================

ID=openstlinux-weston
NAME="ST OpenSTLinux - Weston - (A Yocto Project Based Distro)"
VERSION="4.2.4-openstlinux-6.1-yocto-mickledore-mpu-v24.06.26 (mickledore)"
VERSION_ID=4.2.4-openstlinux-6.1-yocto-mickledore-mpu-v24.06.26
VERSION_CODENAME="mickledore"
PRETTY_NAME="ST OpenSTLinux - Weston - (A Yocto Project Based Distro) 4.2.4-openstlinux-6.1-yocto-mickledore-mpu-v24.06.26 (mickledor"

[Christophe Guibout · Accepted solution]

Hello @Ethan58 ,

Your sound card is not recognized as a snd-usb-audio device,  that's why there is no alsa entry.

First, I would recommand to cross-check that your USB sound card is well supported by the kernel, and if it is the case, you may need to enable something in your kernel configuration.

I would recommand the following wiki article : https://wiki.st.com/stm32mpu/wiki/How_to_customize_the_Linux_kernel

I tried with my Jabra headset which is well recognized by default:

[ 6660.127684] usb 1-1.2: new full-speed USB device number 3 using ehci-platform
[ 6660.248734] input: GN Netcom A/S Jabra EVOLVE LINK as /devices/platform/soc@0/42080000.bus/42080000.bus:usb@482e0000/482f0000.usb/u2
[ 6660.320415] input: GN Netcom A/S Jabra EVOLVE LINK as /devices/platform/soc@0/42080000.bus/42080000.bus:usb@482e0000/482f0000.usb/u3
[ 6660.331930] input: GN Netcom A/S Jabra EVOLVE LINK Consumer Control as /devices/platform/soc@0/42080000.bus/42080000.bus:usb@482e004
[ 6660.350264] hid-generic 0003:0B0E:0306.0001: input,hiddev96: USB HID v1.00 Device [GN Netcom A/S Jabra EVOLVE LINK] on usb-482f00003
[ 6660.571570] usbcore: registered new interface driver snd-usb-audio

root@stm32mp2-e3-b8-dc:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: LINK [Jabra EVOLVE LINK], device 0: USB Audio [USB Audio]
 Subdevices: 1/1
 Subdevice #0: subdevice #0

BR,

Christophe

[Ethan58]

Hi @Christophe Guibout

Thank you very much for your advice.

I will check my kernel configuration.