[sdiy] Moogey jitter

[Antti Huovilainen]

On Sun, 16 Apr 2006, Ian Fritz wrote:

> The amplitude variations seen in the Moog waveform are due to small 
> transients at the switching point of the waveform.  These come and go at a

These are most likely due to the anti-aliasing filter of the soundcard. 
This is a good reason to use 192kHz samplerate when analyzing analog 
waveforms since it reduces the ripple (which is not audible).

Another problem with single waveform comparison/analysis is that ear is 
not very sensitive to small spectrum amplitude / phase / frequency 
differences. However, once you mix two or more oscillators, these errors 
translate to dynamic errors in the beating a (notch filtering basically) 
which is much more easily audible.

Antti

"No boom today. Boom tomorrow. There's always a boom tomorrow"
   -- Lt. Cmdr. Ivanova