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

[Harry van Haaren]

On Thu, Jan 2, 2014 at 11:49 AM, Bill Gribble <grib at billgribble.com> wrote:
> How is there any way at all that increasing the sampling rate, and
changing nothing else, will improve the lowest reliable latency of a system?

The question here isn't really about lowest reliable latency, but reducing
latency by changing samplerate. Reliable latency is a totally different
question which indeed involves system tuning, RT kernels, IRQ threading &
priority etc.

You'll know this but for completeness, a simple example:
Keeping the "number of buffers" and "frames per buffer" constant,
increasing the samplerate will reduce latency purely because the number of
sames represents less time at the higher sample rate.

64 x 2 @ 48kHz = 2.67msec
64 x 2 @ 96kHz = 1.33msec
=> Doubling the samplerate halves the latency

Cheers, -Harry
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