[Openal] Implementing a Mac-based system
matthew.tata at uleth.ca
Mon May 14 11:03:59 PDT 2007
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:
> Hi Matt,
> 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
> 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 speaker system.
> 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 speakers
>> to do auditory research. We're transitioning our entire lab (slowly)
>> to Apple computers and I need some advice on the hardware setup.
>> Most of what we do requires using Powerbooks and Macbook Pros, which
>> have optical digital audio out. Last I heard these only supported
>> 1. Does the digital output from a Macbook Pro handle 7.1 speakers?
>> 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 for a
>> source to play and when the sound actually plays with such a system?
>> 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.
>> Assistant Professor
>> 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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