Here is another questions (to make it easier): 7) How do I do accomplish this using an asoundrc file? I can't even figure that out. I've got an SB Live! 5.1 (EMU10K1). How do I 'simply' setup 2 'streams' (not sure I'm using the correct terminology). The first stereo 'stream' would output to the front L/R speakers at 25kHz. This first stream would only require an input 'wav' file of 2 channels (stereo). The second 'stream' would output to the rear L speaker at 22050Hz. This second would only require an inpt 'wav' file of 1 channel (mono).
I mean under OSS this is so simple! Open /dev/dsp at 25kHz and open /dev/dsp1 at 22050Hz. Unfortunately, I cannot get the routing to work reliably under OSS which is why I'm attempting the world of ALSA. On Wed, 2004-02-25 at 14:16, Ken Bass wrote: > I'm trying to accomplish a programming task and am pretty confused about > the capabilities of the sound drivers and how I would accomplish this in > an application. I've been through the HOWTO and tutorial as well as > attempted to read the PCM interface parts of the also-lib docs. But I've > got more questions than answers. The SB-Live-mixer.txt was not helpful. > > I've got an SB Live! 5.1 (EMU10K1) device that is my target using analog > outputs. > > High Level: > > 1) I've got 3 separate PCM 'mono' streams of data that I want to send to > 3 different outputs. > > a) How many PCM inputs do these cards/drivers support? Under OSS, > there were 2, /dev/dsp and /dev/dsp1. Ideally I would like each input > stream to have a seperate sample rate. In practice, 2 of them will be > 25kHz, and one will be 22050Hz. > > 2) I want to reconfigure the 'routing' on the fly. How do I do this? > I've seen documentation (which wasn't clear) about .asoundrc files and > such, but I need to change this programmaticaly. > Input 1- 25 kHz PCM stream > Input 2- 25 kHz PCM stream > Input 3- 22050Hz PCM stream > Output 1 - Front L > Output 2 - Front R > Output 3 - Rear L > > I want to route (on the fly) any of those inputs to any of those > outputs (being careful to erase all routes and recreate them each time I > reconfigure). > > 3) I'm totally confused about the capabilities of this card. Is this > described at a high level somewhere or can someone explain this? > > 4) I'm not clear how to control these routes, what 'hw' device names to > use, etc. I've seen references to ld10k1, > > 5) In the SB-Live-mixer.txt, section 3, PCM stream related controls -- > I'm lost. What is a PCM Send Routing, what are A, B, C, D destinations, > why is there a distinction between mono and left/right, and how are > these controlled? > > 6) I see references to 'surround40' or 'surround51'. I'm not sure if > that is what I want because they cannot be changed on the fly. > > > > > ------------------------------------------------------- > SF.Net is sponsored by: Speed Start Your Linux Apps Now. > Build and deploy apps & Web services for Linux with > a free DVD software kit from IBM. Click Now! > http://ads.osdn.com/?ad_id=1356&alloc_id=3438&op=click > _______________________________________________ > Alsa-devel mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/alsa-devel ------------------------------------------------------- SF.Net is sponsored by: Speed Start Your Linux Apps Now. Build and deploy apps & Web services for Linux with a free DVD software kit from IBM. Click Now! http://ads.osdn.com/?ad_id=1356&alloc_id=3438&op=click _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
