Subject: Re: [linux-audio-dev] Buffer size settings - Mac/Windows
From: Michael Ost (most_AT_museresearch.com)
Date: Sat Jun 12 2004 - 23:00:58 EEST
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
>
>
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