🚀 go-pugleaf

copley-devon@cs.yale.edu (Devon Copley) writes:

>....  What (supposedly) is happening
>in the SBPro is that, due to some sort of inadequacies in the circuitry,
>its frequency response rolls off at 2.6 kHz.

I remember reading that the reason this happens is that the SBPro doesn't
allow you to change the low-pass filter frequency.  This simplified some
circuitry and allowed them to lower the cost, but because of the Nyquist
theorem it means that many of your sampling rates will give you inferior
results.

Cards like the PAS, PAS+, and PAS-16 have a software-selectable sample
rate and cutoff frequency.  When you choose a sample rate through the
Windows driver, it sets the filter to match the rate.  If you just bang
the hardware yourself under DOS, you will have to make sure to set it for
yourself.

					Andy Valencia