Add USB Audio Support

[chris27]

I can't get USB Audio to work on the new Yocto image on the WBQ. How do I enable USB Audio?

[Richard]

Hello, Chris:

For the latest wandboard yocto QT5 image has enabled USB Audio:
http://www.wandboard.org/images/downloa ... 140106.zip

You can check with the command:
zcat /proc/config.gz | grep USB_AUDIO

If you build yocto image by yourself, you can refer to this link:
https://community.freescale.com/docs/DOC-95045

$ bitbake -c menuconfig linux-wandboard

Add usb audio configuration in kernel:
Symbol: SND_USB_AUDIO [=n] │
│ Type : tristate │
│ Prompt: USB Audio/MIDI driver │
│ Defined at sound/usb/Kconfig:12 │
│ Depends on: SOUND [=y] && !M68K && SND [=y] && SND_USB [=n] && USB [=y] │
│ Location: │
│ -> Device Drivers │
│ -> Sound card support (SOUND [=y]) │
│ -> Advanced Linux Sound Architecture (SND [=y]) │
│ -> USB sound devices (SND_USB [=n]) │
--- USB sound devices │ │
│ │ <*> USB Audio/MIDI driver │ │
│ │ < > Edirol UA-101/UA-1000 driver (NEW) │ │
│ │ < > Native Instruments USB audio devices (NEW) │ │
│ │ < > TerraTec DMX 6Fire USB (NEW)
│ Selects: SND_HWDEP [=n] && SND_RAWMIDI [=n] && SND_PCM [=y]

Overwrite the defconfig (under sources/meta-fsl-arm-extra/recipes-kernel/linux/linux-wandboard-3.0.35) with the new .config.
Then,

$ bitbake -c cleansstat linux-wandboard
$ bitbake fsl-image-gui

[JohnW]

Another good source for building Yocto for Wandboard is here:

http://wiki.wandboard.org/index.php/Getting_started_with_Yocto_on_Wandboard

[EdnaHall]

Add usb audio configuration in kernel:
Symbol: SND_USB_AUDIO [=n] │
│ Type : tristate │
│ Prompt: USB Audio/MIDI driver │????

[saicharan]

Your USB audio port can be surprisingly useful--giving you even better sound ... from your computer's other electronics, which tend to add audio interference.