Sitecom CN-126 recording works, playing doesn't

[sjoerd]

Hello all,

Thanks so far for the suggestions to get everything to work, it's a great forum!

Now that the custom firmware is up and running, I connected a 5.1 USB adapter from Sitecom (CN-126, which is reported to work). /dev/sound is empty at first, after connecting I see

crw-------    1 admin    root      14,   3 Jan  1 00:00 dsp
crw-------    1 admin    root      14,   0 Jan  1 00:00 mixer
crw-------    1 admin    root      14,  16 Jan  1 00:00 mixer1

catting /dev/sound/dsp to a file (recording) works, I can scp the raw file to my PC and play it with Audacity. I hear something (probably the import settings of Audacity are wrong), but at least it works.
catting some data to /dev/sound/dsp doesn't work. The 'access' led on the USB adapter doesn't flash, and I don't hear anything, too. When I stop the catting with Ctrl-C, it says:

-sh: cannot create /dev/sound/dsp: Interrupted system call

Dmesg gives:

hub.c: new USB device 00:04.0-1, assigned address 2
usbaudio: device 2 audiocontrol interface 0 has 1 input and 1 output AudioStreaming interfaces
usbaudio: device 2 interface 2 altsetting 1 channels 2 framesize 2 configured
usbaudio: valid input sample rate 48000
usbaudio: device 2 interface 2 altsetting 1: format 0x01000010 sratelo 48000 sratehi 48000 attributes 0x00
usbaudio: device 2 interface 1 altsetting 0 does not have an endpoint
usbaudio: device 2 interface 1 altsetting 1 channels 2 framesize 2 configured
usbaudio: valid output sample rate 48000
usbaudio: device 2 interface 1 altsetting 1: format 0x01000010 sratelo 48000 sratehi 48000 attributes 0x00
usbaudio: device 2 interface 1 altsetting 2 channels 6 framesize 2 configured
usbaudio: valid output sample rate 48000
usbaudio: device 2 interface 1 altsetting 2: format 0x05000010 sratelo 48000 sratehi 48000 attributes 0x00
usbaudio: registered dsp 14,3
usbaudio: constructing mixer for Terminal 6 type 0x0301
usbaudio: warning: found 2 of 6 logical channels.
usbaudio: no idea what's going on..., contact linux-usb-devel@lists.sourceforge.net
usbaudio: registered mixer 14,0
usbaudio: constructing mixer for Terminal 7 type 0x0101
usbaudio: registered mixer 14,16
usb_audio_parsecontrol: usb_audio_state at 808826e0
usbin_completed: descriptor not restarted (usb_submit_urb: 0)
usbin_completed: descriptor not restarted (usb_submit_urb: 0)
usbin_completed: descriptor not restarted (usb_submit_urb: 0)
usbin_completed: descriptor not restarted (usb_submit_urb: 0)
usbin_completed: descriptor not restarted (usb_submit_urb: 0)
usbin_completed: descriptor not restarted (usb_submit_urb: 0)
usbin_completed: descriptor not restarted (usb_submit_urb: 0)
usbin_completed: descriptor not restarted (usb_submit_urb: 0)

Maybe it has problems with the 5.1 output channels (doesn't know which one to choose). I also scp'ed madplay and a MP3 file and let it stream to /dev/sound/dsp, but it doesn't work (decoding to /dev/null works).

What am I doing wrong?

Thanks in advance,
Sjoerd

[sjoerd]

Hello all,

The problem is solved (thanks palbeda for that): waveserver and waverservermain were running in the background and kept the sound device busy. Solution is to execute this (or put it in the post-boot script):

killall waveserver
killall waveservermain

Thanks for listening,
Sjoerd