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

Fons Adriaensen wrote:
> On Wed, Jan 01, 2014 at 03:21:29AM -1000, Joel Roth wrote:
>
> > I was curious, if doubling the sample rate is a
> > practical way to reduce latency for live effects
> > processing. I would think it would reduce latency by half.
>
> 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.

Thanks for speaking up, Fons. I learn something new in
everything you post.
  

-- 
Joel Roth
  
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