Hi, So far i'm following this list, there are some people interested in environmental audio, and advanced effect processing support. Regarding this i would like to share some thoughts about and hopefully collect some critics and comments.
How i visualize environmental audio for the common user: Context: The user has a Soundboard with several audio outputs (most of them do). He/She may connect just a headphone or 2 speakers or a 5.1 setup, 7.1, or whatever the card supports. Problem: It's up to the application to support either 5.1, headphones or whatever. You may end up not hearing some channels (your soundcard has 6 outputs, but you just have headphones, or you have 6 speakers and your are hearing a stereo stream on just 2 speakers). There is a lot of duplicated code in different applications, and there is no standard about how this down or up mix should be done. It may be impossible to exploit any advanced hardware feature (see Advantage). Idea: Support any audio channel arrangement, and mix it in hardware or software (plugins, dmix ?) to the actual number of speaker/headphones channels. Define a standard how channel formatting should be converted/mixed, etc. Requirements: The user has to tell ALSA what kind of speakers/headphones is she/he using (not a big deal). Advantage: We could support 7.1 or 5.1 environmental audio on headphones, by using hardware HRTF filters to put each stream at the desired spatial position. On some soundcards this is trivial (just a matter of routing). Caveats: It involves work obviously. I'm willing to volunteer on this. Any comments are gladly welcome. Best Regards Manuel ------------------------------------------------------- This SF.Net email is sponsored by: IBM Linux Tutorials Free Linux tutorial presented by Daniel Robbins, President and CEO of GenToo technologies. Learn everything from fundamentals to system administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
