[Arny Krueger[_4_]]

"Audio Empire" wrote in message
...

You would certainly have to move the filter up in frequency in order to
use
that extra bandwidth, otherwise the filter would simply treat the signal
like
any other digital audio stream and start to roll-off the frequency
response
above 22 KHz. What the use of high sampling rates does is to move any
quantization noise further out of the passband as the sampling rate
increases.

Whether that happens very strongly depends whether or not noise shaping is
used. If unshaped quantization is used, the actual change in the amount of
quantization noise at the most audible frequencies is minor or even moot.

Whether this is of any practical consideration is debatable.
Double-blind tests seem to show that this is no real consequence,

True, and at this point the number of such tests performed by both experts
and talented amateurs is very significant.

but some will hotly debate the point.

It takes reliance on sighted evaluations in a situation where they don't
work to reach or support this conclusion. This is one of those cases where
its not hard to hear what is there to hear. It is also fairly easy to set up
training runs where the effect is highly audible.

Seems to me that I read somewhere that modern 24/192 DAC chips move the
antialiasing frequency as the sample rate increases.

Virtually all of them. It is a natural consequence of digital filtering. It
costs extra to keep that from happening. So, it is almost never done.