SV: Re: Re: Re: Re: [sdiy] Boogey jitter

[Magnus Danielson]

From: "Paul Perry" <pfperry at melbpc.org.au>
Subject: Re: SV: Re: Re: Re: Re: [sdiy] Boogey jitter
Date: Sun, 23 Apr 2006 22:00:40 +1000
Message-ID: <006501c666cd$8bd72760$0a01a8c0 at frostwave>

> I havn't had much to say on this (apart from my
> suggestion that switching spikes from one oscillator
> may be pulling other oscillators in subtle ways) but,
> here's another thought: 1/F (flicker) noise in analog
> gear.

It is certainly there and it does certainly contribute to the frequency flicker
of oscillators, which can clearly be seen when monitoring the frequency over
longer time-spans (100-1000 s).

To what degree it contributes to the psychoacoustical effects of "warmth",
"fatness" or "interesting" is still to be determined.

It should be noted that most sources of pink noise does not keep the -3 dB
curve needed at such low frequencies, so using a audio-grade pink noise source
does normally not suffice to "proove" the effect or rule it out.

Cheers,
Magnus