[linux-audio-user] New Asus Ath. XP 2500 Delta 1010LT performance

Anahata anahata at treewind.co.uk
Thu Jul 8 03:20:30 EDT 2004


Oa    , Jul 07, 2004 at 03:40:39PM -0700, Russell Hanaghan wrote:
> On Wed, 2004-07-07 at 15:01, Greg Murphy wrote:
> > It is the concensus that 96kHZ is a Good Thing
> > (tm). 
> 
> My only, somewhat less than engineering level thoughts were that some of
> the fidelity on the reverb and delay tails might be enhanced with a
> little additional fidelity.

That's a plausible argument for more bits, but not for faster sampling.

Somebody mentioned anti-aliasing filters: That's where the benefit
lies. When you go from from 48kHz  to 96kHz sampling rate, the gap 
between passband and stopband for your antialiasing filters goes up 
from 8kHz to 56kHz (assuming a 20kHz audio band) so you can make much
better filters: flatter response to 20kHz, less phase error in that
range, less overshoot on transients, much smoother clipping if you ever 
go over range on the A-D, and less interference from spurious HF signals
appearing at the input.

-- 
Anahata
anahata at treewind.co.uk       Tel: 01638 720444
http://www.treewind.co.uk    Mob: 07976 263827


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