[Openal] Implementing a Mac-based system
jmt at atc.creative.com
Mon May 14 13:40:49 PDT 2007
You can use any USB/Firewire multichannel audio solution. You need to
launch "Audio MIDI setup.app" (in "Applications/Utilities/") and configure
it to whatever format you need and OpenAL will spatialize sounds according
to that format. If you use an AV receiver, you'll need one that has 7.1
analog in. Otherwise computer oriented speaker systems like the Creative
Gigaworks 750 would work: it's a 7.1 speaker system with 7.1 analog in
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Re: [Openal] Implementing a
Thanks for that info. Can you or anybody else on the list think of a way
to get 7.1 surround from a Macbook Pro using OpenAL? Or am I limited to
buying sound cards for desktop machines?
On May 11, 2007, at 9:32 AM, Raymond Balogh wrote:
1. Yes, but I don`t think it will help in your case. Optical and
Coaxial SPDIF outputs (like the one you mentioned handle multichannel
sound only in encoded form (Dolby Digital or DTS and their variants).
That means there is an encoded bitstream sent through the output and
it can be anything from 1.0 mono to 7.1 surround based on what
encoding has been used. If the source is not encoded you will only
get stereo signal using the mentioned SPDIF connection.
2. The S750 does not have digital inputs. You would need an external
device to convert digital signal to analog and feed that to the
3. I don`t know :-)
On Thu, 10 May 2007 22:27:54 +0100, Matthew Tata <
matthew.tata at uleth.ca> wrote:
I use OpenAL in conjunction with a Creative soundcards and
to do auditory research. We're transitioning our entire lab
to Apple computers and I need some advice on the hardware
Most of what we do requires using Powerbooks and Macbook Pros,
have optical digital audio out. Last I heard these only
1. Does the digital output from a Macbook Pro handle 7.1
2. Do I need an entirely new system with a digital tuner and
speakers, or is there a way to use my existing Creative S750
3. What is the approximate latency between when my code calls
source to play and when the sound actually plays with such a
I need it to be reliably +/- 2 ms or less.
I greatly appreciate all the help I've gotten from this forum.
Thanks yet again.
Matthew Tata, Ph.D.
The University of Lethbridge
4401 University Drive
Lethbridge, AB T1J 3M4
ph. (403) 394-3994
fax (403) 329-2775
matthew.tata at uleth.ca
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