[LAU] Use of 96 kHz sample rate to lower latency

[Harry van Haaren]

On Wed, Jan 1, 2014 at 7:48 PM, Fons Adriaensen <fons at linuxaudio.org> wrote:
> At least by half, and if the antialiasing filters in the AD/DA
> converters are designed for it, much better. When using small
> period sizes (32 or less), the delay in these filters (which
> are usually linear phase) will be the largest contribution to
> latency.
>
> This delay is roughy inversely proportional to the transition
> band of the filter. If you don't use the full bandwidth that
> 96 kHz offers (up to 48 kHz) it could be much less than half
> the value at 48 kHz. This is why 'digital snakes' connecting
> stage and FOH mixer use 96 kHz.

Interesting, I didn't know this. I will re-check my setup with jack_iodelay
and see what values actually turn up.
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