[Openal-devel] Doing sound fields

[Sherief N. Farouk]

Hi,
I've been doing work on an in-house, very OpenAL-like audio library that
supports run-time loaded audio specialization programs. I'm planning to
release a usable package soon (to benchmark its implementation of some
features that I propose adding to OpenAL, this isn't a 'shameless plug :).
If it'd be useful to you, email me and I'll give you more details on
positioning programs.

- Sherief

> -----Original Message-----
> From: openal-devel-bounces at opensource.creative.com [mailto:openal-
> devel-bounces at opensource.creative.com] On Behalf Of Scott Mayo
> Sent: Monday, March 17, 2008 4:21 PM
> To: openal-devel at opensource.creative.com
> Subject: [Openal-devel] Doing sound fields
> 
> 
> This question came up in a discussion with Chris Robinson, and he
> suggested
> it might be worth bringing up here. To set the background, Chris sent
> me a
> .dll for openAl Soft, which allows me to specify my speaker setup with
> an
> environment variable, which gets around the Vista brain-dead problem of
> forced stereo. (Thanks, Chris!) I've got this working, and can specify
> a
> position x,y,z position for sound, and can hear the sound off in the
> right
> direction. Yay openAL.
> 
> Now the problem. I have what amounts to a theater, rigged for 7.1
> sound,
> with seating for several people. In some situations, I want to produce
> a
> sound that's "out there", in "that direction". This works fine. But in
> many
> cases I'd want to create a sound that appears to originate from just a
> few
> feet away from the listener - well inside the area bounded by the
> speakers.
> The only way to do this is to fire multiple speakers at different
> volumes,
> so the vectors add up to a point inside the room.
> 
> I don't see a way to explain to openAl that my speakers positioned X
> feet
> apart, (X typically about 15), and laid out in a given configuration,
> and
> that a sound 3' from the center needs to be handled by using all the
> speakers (or most) at different volumes.
> 
> I could probably write my own mixing and do it myself. I'd rather not.
> IS
> there an openAL solution, now or planned?
> 
> --
> View this message in context: http://www.nabble.com/Doing-sound-fields-
> tp15899740p15899740.html
> Sent from the OpenAL - Dev mailing list archive at Nabble.com.
> 
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