[Alsa-user] options snd-pcm-oss dsp_map - how does it work?

[karsten <ka...@je...>]

Ok - another basic question.....

MythTv can only select between /dev/dsp and /dev/dsp1 for audio capture.
My WinTV audio capture is on card1

Is it correct that:
- card1 can only be mapped to /dev/dsp1 and /dev/adsp1

I did it this way (is that correct? ):
options snd-pcm-oss dsp_map=1,1
options snd-pcm-oss adsp_map=1,0
I swapped the subdevices because I think 1,1 is the analog capture.


Karsten



dump of misc info files:
[root@i196 ~]# cat /proc/asound/cards
0 [V8235          ]: VIA8233 - VIA 8235
                     VIA 8235 with VIA1612A at 0xe000, irq 10
1 [Bt878          ]: Bt87x - Brooktree Bt878
                     Brooktree Bt878 at 0xdb003000, irq 10

[root@i196 ~]# cat /proc/asound/modules
0 snd_via82xx
1 snd_bt87x

[root@i196 ~]# cat /proc/asound/devices
 17: [0- 1]: digital audio playback
 25: [0- 1]: digital audio capture
 16: [0- 0]: digital audio playback
 24: [0- 0]: digital audio capture
  0: [0- 0]: ctl
 33:       : timer
 57: [1- 1]: digital audio capture
 56: [1- 0]: digital audio capture
 32: [1- 0]: ctl

[root@i196 ~]# cat /proc/asound/pcm
00-00: VIA 8235 : VIA 8235 : playback 4 : capture 1
00-01: VIA 8235 : VIA 8235 : playback 1 : capture 1
01-00: Bt87x Digital : Bt87x Digital : capture 1
01-01: Bt87x Analog : Bt87x Analog : capture 1


[root@i196 ~]# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: V8235 [VIA 8235], device 0: VIA 8235 [VIA 8235]
  Subdevices: 4/4
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1
  Subdevice #2: subdevice #2
  Subdevice #3: subdevice #3
card 0: V8235 [VIA 8235], device 1: VIA 8235 [VIA 8235]
  Subdevices: 1/1
  Subdevice #0: subdevice #0