Re: [Alsa-user] using two sound cards
Lee Revell wrote: I have one sound card onboard of my PC which I have disabled from BIOS. My question is can I activate the second sound card and for example duplicate all that is played on my front speakers of the primary card and pass it to the output of the second card ? If the answer is yes can you give me some clue how to set it up :) There's no easy way with ALSA. A sound server like PulseAudio is required. It should be possible with some obscure .alsa.conf magic, I have had a setup similar to this and working. If what you want boils down to the front-l and front-r channel being sent to two sound cards and the other channels to only one, you should do something like: duplicate the front-l and front-r so you have 6 -> 8 channels and then route the first 6 channels to the first soundcard and the last two channels to the second soundcard. I know it's possible because I once had it working ;-) I can't remember the exact combination of the pcm "types" in the config, though. At the moment I am trying to do something that is a bit similar to your task and I am also struggling with the non-logic of alsa and the sparse documention :-( maybe someone can help me with this one: I want to implement a digital cross-over filter using ladspa filters. I know it's possible because I had this working once, too. AFAIK the approach should be either: - duplicate l/r to a 4-channel stream, split this into to streams with separate pcm slaves, the pcm slaves having either high or low shelf butterworth (ladspa) filters and different pcm hw slaves. - another approach would be to use the property of the ladspa butterworth crossover filter that it can output low and high frequency streams to two separate streams at the same time, that would mean no duplication necessary, but I can't (yet) convince alsa convince to work this way... smime.p7s Description: S/MIME Cryptographic Signature - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
Re: [Alsa-user] using two sound cards
> For now I'm using one Creative Live for 5+1 watching movies and listen > to music. > I have one sound card onboard of my PC which I have disabled from BIOS. > My question is can I activate the second sound card and for example > duplicate all that is played on my front speakers of the primary card and > pass it to the output of the second card ? > If the answer is yes can you give me some clue how to set it up :) If you don't mind a hardware solution to the problem, and your cards have enough inputs/outputs, you can connect the SPDIF out from one card to the SPDIF in on another card, effectively daisy-chaining the cards together. This would result in the first card's audio output only playing audio from the card itself, and the second card's audio output playing audio from both cards. Most cards these days have internal pins for extra inputs and outputs, so you can connect them together internally without any external loopback cables. I know for a fact the SBLive has three stereo digital outputs (one for the front speakers, one for the rear, and one for the centre/subwoofer) so if you connected the front SPDIF-out to your motherboard's SPDIF-in pins you should have the result you're after. Cheers, Adam. - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
Re: [Alsa-user] using two sound cards
On Jan 8, 2008 4:06 AM, Damian Minkov <[EMAIL PROTECTED]> wrote: > Hi all, > > I have a question about using two sound cards. > For now I'm using one Creative Live for 5+1 watching movies and listen > to music. > I have one sound card onboard of my PC which I have disabled from BIOS. > My question is can I activate the second sound card and for example > duplicate all that is played on my front speakers of the primary card and > pass it to the output of the second card ? > If the answer is yes can you give me some clue how to set it up :) There's no easy way with ALSA. A sound server like PulseAudio is required. Lee - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
[Alsa-user] using two sound cards
Hi all, I have a question about using two sound cards. For now I'm using one Creative Live for 5+1 watching movies and listen to music. I have one sound card onboard of my PC which I have disabled from BIOS. My question is can I activate the second sound card and for example duplicate all that is played on my front speakers of the primary card and pass it to the output of the second card ? If the answer is yes can you give me some clue how to set it up :) Thanks in advance, damencho - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
