28 May
2010
28 May
'10
5:27 p.m.
On 05/28/2010 05:05 PM, Ralf Mardorf wrote:
Chris Cannam wrote:
Slew-rates of op-amps are higher by at least an order of magnitude:
off-the shelf cheap op-amps have ~ 10V/us. Fons' test signal may be
~50mV peak-to peak.
In reply to Olivier message Fons already stated that it's not an issue
with sampling. Besides there's usually a low-pass filter on each analog
input.
He probably choose 1015 Hz for aliasing: 48000/1015 or 44100/1015 is not
a common ratio. ~1000 Hz is also in the middle of the card's spectrum
and there's rarely sth. around your house that oscillates at frequency.
There may be more to it, though. Fons?
Why 1015 Hz?
Slew rate of card x's input op-amps?