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JohnerH
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Joined: 01 Mar 2004
Posts: 197
Location: Manchester,United Kingdom
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 Posted: Thu Jan 31, 2008 9:39 pm Post subject: SPDIF & OSS Emulation don't mix, help? [SOLVED] |
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Hello,
Basically for the past couple of months I've been trying to get all the sound out of my box to go through the SPDIF/Toslink output of my card.
I've managed to get basic sound out (ie.: Amarok, mplayer, vlc, etc) but when it comes to flash applications or things that need oss it goes on the blink.
My setup:
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Portishead ~ # lspci |grep audio
00:06.0 Multimedia audio controller: nVidia Corporation MCP2S AC'97 Audio Controller (rev a1)
Portishead ~ # aplay -L
default:CARD=CK8
NVidia CK8, NVidia CK8
Default Audio Device
front:CARD=CK8,DEV=0
NVidia CK8, NVidia CK8
Front speakers
surround40:CARD=CK8,DEV=0
NVidia CK8, NVidia CK8
4.0 Surround output to Front and Rear speakers
surround41:CARD=CK8,DEV=0
NVidia CK8, NVidia CK8
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=CK8,DEV=0
NVidia CK8, NVidia CK8
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=CK8,DEV=0
NVidia CK8, NVidia CK8
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
null
Discard all samples (playback) or generate zero samples (capture)
Portishead ~ # cat /proc/asound/devices
0: [ 0] : control
16: [ 0- 0]: digital audio playback
18: [ 0- 2]: digital audio playback
24: [ 0- 0]: digital audio capture
25: [ 0- 1]: digital audio capture
33: : timer
Portishead ~ $ more .asoundrc
pcm.!default {
type hw
card 0
device 2
}
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This setup as it is works for must sound...sound goes out through the SPDIF port in to my external DAC, etc...
When I try to enable,
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Advanced Linux Sound Architecture --->
<*> Advanced Linux Sound Architecture
<*> Sequencer support
<*> OSS Mixer API
<*> OSS PCM (digital audio) API
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pufff, the sound goes dead, not a peep comes out...
Any ideas? I'd really like to get flash work on firefox as a starter...
Thank you in advance for the help...
_________________
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I think I had a thought once but it Died of Lonelyness...
Last edited by JohnerH on Fri Feb 01, 2008 3:21 pm; edited 1 time in total |
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hampelratte
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Joined: 29 Jul 2005
Posts: 155
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| Posted: Fri Feb 01, 2008 12:23 pm Post subject: |
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I think, you have to adjust your .asoundrc. Here is mine. The article is written in german, but maybe you can have a look at the commands and the .asoundrc to get a clue. My alsa setup with my .asoundrc supports the following: oss emulation, softwaremixing, microphone, dolby digital pass through and all sound goes out over the spdif jack.
I think, you could use this .asoundrc. The only thing to do is, to find out which alsa device is your digital out and then replace it in the .asoundrc.
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# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC883 Analog [ALC883 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 1: ALC883 Digital [ALC883 Digital]
Subdevices: 0/1
Subdevice #0: subdevice #0
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card 0, device 1 is the digital device -> that's why my asoundrc. pcm.dmixer section points to hw:0,1
BR
Henrik |
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JohnerH
Apprentice
Joined: 01 Mar 2004
Posts: 197
Location: Manchester,United Kingdom
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| Posted: Fri Feb 01, 2008 3:18 pm Post subject: |
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This semi-work, the sound comes out, but the quality os shocking...really really bad, so I don't know what to change...any ideas?
Well I had to change the config to match my own settings, my digital address, is 0,2 so, this became my file...
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pcm.!default {
type plug
slave.pcm "mic"
}
# this is needed for the mic
pcm.card0 {
type hw
card 0
}
# this enables the mic
pcm.mic {
type asym
playback.pcm "dmixer"
capture.pcm "card0"
}
# dmix output over spdif
pcm.dmixer {
type dmix
ipc_key 1024
ipc_perm 0660
slave {
pcm "hw:0,2" # [b]changed this to reflect my spdif out...[/b]
channels 6
period_time 0
period_size 512
buffer_time 0
buffer_size 4096
}
bindings {
0 0 # map from 0 to 0
2 2 # map from 1 to 1 [b]I Had to change this from 1 1 to 2 2, is this right?[/b]
}
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I think I had a thought once but it Died of Lonelyness... |
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JohnerH
Apprentice
Joined: 01 Mar 2004
Posts: 197
Location: Manchester,United Kingdom
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| Posted: Fri Feb 01, 2008 3:20 pm Post subject: |
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Got it!
Changed....
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bindings {
0 0 # map from 0 to 0
2 2 # map from 1 to 1
}
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to...
| Code: |
bindings {
0 0 # map from 0 to 0
1 1 # map from 1 to 1
}
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Which was what the article quoted at he beginning...
Thank you for your help!
_________________
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I think I had a thought once but it Died of Lonelyness... |
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hampelratte
Apprentice
Joined: 29 Jul 2005
Posts: 155
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| Posted: Fri Feb 01, 2008 3:28 pm Post subject: |
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| I have spent hours to get alsa working with SPDIF/dmix/mic. That's why I wrote the article. Good to hear, that it is useful for other users, too. |
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