3 Jan
2014
3 Jan
'14
2:12 a.m.
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