[linux-audio-user] Advanced Linux Sound(ALSA), PPC, M-audio Duo

John M Phillips phillipsjohnm at earthlink.net
Sat Dec 7 17:06:00 EST 2002


I am trying to user USB-AUDIO product with a TI laptop for a portable
digital recorder.

I have followed the instructions at 
http://www.alsa-project.org/alsa-doc/doc-php/template.php3
 ?company=Midiman&card=USB+Audio+Duo&chip=Cypress+AN2131XX&module=usb-audio

The compiles for building alsa-driver-0.9.0rc6, alsa-lib-0.9.0rc6, and  
alsa-utils-0.9.0rc6 went smoothly.  The utility snddevices ran with no 
errors. 

When running the commad alsamixer, I get the error message
	"No mixer elems found."

Proc/asound appear to have the correct entries
	
dr-xr-xr-x    4 root  root    0 Dec  7 16:55 card0
-r--r--r--    1 root  root    0 Dec  7 16:55 cards
dr-xr-xr-x    2 root  root    0 Dec  7 16:55 dev
-r--r--r--    1 root  root    0 Dec  7 16:55 devices
lrwxrwxrwx    1 root  root    0 Dec  7 16:55 MidimanDuo -> card0
dr-xr-xr-x    2 root  root    0 Dec  7 16:55 oss
-r--r--r--    1 root  root    0 Dec  7 16:55 pcm
dr-xr-xr-x    2 root  root    0 Dec  7 16:55 seq
-r--r--r--    1 root  root    0 Dec  7 16:55 timers
-r--r--r--    1 root  root    0 Dec  7 16:55 version

With Proc/asound/card0 having
-r--r--r--    1 root  root    0 Dec  7 17:00 id
-rw-r--r--    1 root  root    0 Dec  7 17:00 oss_mixer
dr-xr-xr-x    3 root  root    0 Dec  7 17:00 pcm0c
dr-xr-xr-x    3 root  root    0 Dec  7 17:00 pcm0p
-rw-r--r--    1 root  root    0 Dec  7 17:00 stream0

I found the contributed utility qinit and it runs
correctly with the hw name = "hw:0,0".

With the "dmasound_pmac" module, 
   dd if=/dev/dsp of=/tmp/sound.out bs=1024 count=1

would produce a file filled with unsigned bytes.

The rest of the day was spent trashing about in config
files to no effect.

Questions:

Should alsamixer work with the M-Audio Duo?

After enabling with qinit should dd dump data?

Any help, or fellow travellers would be appreciated.

John Phillips






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