On 08/19/2014 01:11 AM, Daniel Mack wrote:
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
Daniel,
Thanks. You were trying UAC2, right? Does it work with Windows 7/8 host?
Did you try UAC1 too?
--
Thanks,
Xuebing Wang
--
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
