On 08/15/2014 05:49 AM, Xuebing Wang wrote: > Jassi, thanks for your help. > > Without knowing what is the best way to implement UAC2 at the device > side, I managed to simply pipe is as below: > > Note: When I am playing music from Ubuntu host, I can hear light noise > from the device (via UAC2) > > > root@imx6slevk:~# modprobe g_audio c_srate=48000 > g_audio gadget: Linux USB Audio Gadget, version: Feb 2, 2012 > g_audio gadget: g_audio ready > root@imx6slevk:~# g_audio gadget: high-speed config #1: Linux USB Audio > Gadget > > root@imx6slevk:~# > root@imx6slevk:~# arecord -f dat -t wav -D hw:2,0 | aplay -D hw:0,0 > Recording WAVE 'stdin' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo > Playing WAVE 'stdin' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo Such a setup should work, I recently tried it myself. The other direction (capturing from host, playback on device), however, has a major problem as the device interface has no timing mechanism, and hence 'arecord | aplay' on the gadget side fails. I've prepared patches and a more comprehensive description for this, but I'm waiting for Andrzej's patches to be reviewed, as mine are based upon his. Thanks, Daniel -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
