Everything works perfectly in ordinary stereo (two channel) mode.
But,
$ aplay -L
null
Discard all samples (playback) or generate zero samples (capture)
default:CARD=MID
HDA Intel MID, ALC889 Analog
Default Audio Device
sysdefault:CARD=MID
HDA Intel MID, ALC889 Analog
Default Audio Device
front:CARD=MID,DEV=0
HDA Intel MID, ALC889 Analog
Front speakers
surround21:CARD=MID,DEV=0
HDA Intel MID, ALC889 Analog
2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=MID,DEV=0
HDA Intel MID, ALC889 Analog
4.0 Surround output to Front and Rear speakers
surround41:CARD=MID,DEV=0
HDA Intel MID, ALC889 Analog
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=MID,DEV=0
HDA Intel MID, ALC889 Analog
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=MID,DEV=0
HDA Intel MID, ALC889 Analog
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=MID,DEV=0
HDA Intel MID, ALC889 Analog
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=MID,DEV=0
HDA Intel MID, ALC889 Digital
IEC958 (S/PDIF) Digital Audio Output
$ /usr/bin/speaker-test -c 6 -t wav
speaker-test 1.0.28
Playback device is default
Stream parameters are 48000Hz, S16_LE, 6 channels
WAV file(s)
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 2048 to 16384
Period size range from 1024 to 1024
Using max buffer size 16384
Periods = 4
was set period_size = 1024
was set buffer_size = 16384
0 - Front Left
1 - Front Right
2 - Unused
3 - Unused
4 - Unused
5 - Unused
Time per period = 8.298641
$ /usr/bin/speaker-test -c 6 -D surround51 -t wav
speaker-test 1.0.28
Playback device is surround51
Stream parameters are 48000Hz, S16_LE, 6 channels
WAV file(s)
Playback open error: -16,Device or resource busy
How do I access channels beyond the first two?
Thanks.
Nuzhna
------------------------------------------------------------------------------
_______________________________________________
Alsa-user mailing list
Alsa-user@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/alsa-user
