[opus] High Sampling Rates

[Jean-Marc Valin]

On 07/06/14 02:35 AM, Andrew Lentvorski wrote:
> 192KHz is useful for the same reason that 24 bits is useful.
> Digital operations often need the extra margin for many of the
> operations being carried out (IIR-type effects, mixing multiple
> sources, etc.)  This is especially true for the so-called "wet"
> effects that tend to mangle phase vs frequency (vs "dry" effects
> which tend to only affect amplitude vs frequency).

Actually... no! 24-bit can indeed be useful as extra margin and Opus
can actually represent even more dynamic range than 24-bit PCM. That's
not the case for 192 kHz. There's no "margin" that 192 kHz buys you
over 48 kHz. You can do as much linear filtering as you like, the
stuff above 20 kHz isn't going to help you.

	Jean-Marc