[linux-audio-dev] Buffer size settings - Mac/Windows

[Michael Ost]

Well, no responses, no surprise... since this is a Windows/Mac issue.
But if you are curious, we scoped a win2k machine with a audiophile card
running vstack. 

The latencies showed that the 128 sample setting matches an ALSA "semi
buffer". That is, a minimum of 256 samples of latency. This despite the
128-sample-like latency claims in the MAudio driver setup dialog.

Anyway, more info for the curious... mo

On Thu, 2004-06-10 at 20:52, Michael Ost wrote:
> Hi.
> 
> Does anyone out there know what the audio buffer size settings in
> Windows and MacOS really mean? If you say "128 samples" does that
> translate to 2 buffers of 128 samples --- one buffer playing, one buffer
> filling --- or 2 buffers of 64 samples? Is it 256 samples of latency or
> 128?
> 
> I realize this isn't _exactly_ a Linux audio question, but perhaps
> someone out there knows something about this. We're trying to get an
> apples to apples comparison of our Linux/ALSA based system with a
> Windows/MacOS system.
> 
> We set the ALSA driver to 2x128 and we get results that jibe more with
> the 256 setting in Windows. 
> 
> But when we hooked a Windows system up to a scope it looked more like
> the 128 sample setting was running 2x64 samples. So... we're confused.
> 
> Any pearls of wisdom out there? ... mo
> 
> ===================================
> Michael Ost, Software Architect
> Muse Research, Inc.
> most at museresearch.com 
> 
>