[linux-audio-dev] Using ray tracing cpu for audio synthesis

Dave Griffiths dave at pawfal.org
Tue Mar 15 10:05:21 UTC 2005

On Tue, 15 Mar 2005 18:05:02 +0900, David Cournapeau wrote
> Hi there,
>     I think I am not the only one here to have heard about so called 
> '3d ray tracing cpu' (e.g: 
> http://graphics.stanford.edu/papers/rtongfx/rtongfx.pdf, and a 
> recent news on /. about some demos at CeBit ). There also were some 
> emails here about using GPU for sound synthesis recently, mainly 
> about the shortcomings of those technics (memory bandwidth problems, 
> difference of rate scales, if I understood corectly).
>     Unfortunately, I know nothing about computer graphics, I don't 
> know exactly what this ray tracing cpu technology is (maybe 
> vaporware ?), but I wondered if this can be used for audio 
> technology, e.g RT reverbs, etc... Does anyone have an idea about 
> the possible usage of this kind of chips for audio processing ?

GPU's can be used for general purposes, but I'm not sure how suitable they
would be for audio work - the reason for this is the readback latency for
getting data back from the card, they are currently highly optimised for
display only (for applications like games). This is changing though, with
nvidia working on PCI express, which should speed this up considerably.

This is also interesting: http://graphics.stanford.edu/projects/brookgpu/



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