[sdiy] Moog wander

[René Schmitz]

Hi Magnus and all,

Magnus Danielson wrote:

> There are these physcoacoustical sensations that is refered to as "cold" and
> "warm". They keep creating a heated (warm?) debate. I keep wondering what kind
> of measurable characteristics is actually correlating to either of them.

I know, so do I.

> The slope of the noise drops about 6 db as it goes from 48 mHz to 132 mHz.
> Mind you that this measuing frequency, so the noise is FM noise and needs a
> correction for phase slope. Doing a few more measures gives away something like
> 3-4 dB/Oct of slope (frequency does not come out log but lin). If it is
> 3 dB/Oct it would be flicker frequency modulation and have f^-3 as PSD
> characteristics.

I would be very interested in the amplitude of these fluctuations. I 
would guess that the actual spectral distribution isn't so critical per 
se, rather the "corner" frequencies. To test out the theory one could 
try to synthesize up a "perfect" waveform, with a noise FM/AM/PM 
superimposed that mimics the one you observed, and then judge it.
A theory has to be tested, *thats* scientific.

Cheers,
  René

-- 
uzs159 at uni-bonn.de
http://www.uni-bonn.de/~uzs159