Re: Stereo playback problems

On 12/03/2012 07:07 PM, Steven Fuchs wrote:
> The stereo sources never get their locations set. So when the music
> (stereo) sounds are played I'm getting reports that it comes out as
> mono in OpenALSoft.
>
> The version we upgraded to is 1.14. Which did fixed some windows
> crashes. It seems like the last version used, that did work, was
> 1.1.

Might be because of the way channel positioning is done.

By default, stereo output places the "virtual" output speakers at +/-90 
degrees. This is so you get even panning when a sound circles around in 
front and in back.

A stereo source, however, has the virtual emitters placed at +/-30 
degrees. This is so it sounds good with surround sound and HRTF output.

What this means is that instead of the left source channel going 
directly to the left output channel with stereo output, and the right 
channel going directly to the right output, they get panned by 33% to 
the other side. This results in less stereo separation, so it sounds a 
bit more "mono" (although not completely).

Unfortunately I haven't found a very clean way to handle this. Perhaps I 
could make stereo sources use +/-90 degrees when using stereo output. 
Not the best, but it would help for people using stereo and shouldn't 
get in the way of anything.


So this should be fixed for OpenAL Soft 1.15, which should be out either 
later today or tomorrow.
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