[sdiy] Moog wander

[Magnus Danielson]

From: Antti Huovilainen <ajhuovil at cc.hut.fi>
Subject: Re: [sdiy] Moog wander
Date: Sun, 16 Apr 2006 22:37:43 +0300 (EEST)
Message-ID: <Pine.GSO.4.61.0604162235000.291 at vipunen.hut.fi>

Antti,

> On Sun, 16 Apr 2006, Magnus Danielson wrote:
> 
> > I clearly see a 50 Hz peak in the modulation, but beyond that it is clearly
> > noise. I am not looking right at the VCO, I look at the normal output (which
> 
> I have software to do extremely high resolution analysis of sawtooth 
> frequency over long term (simulations showed it has 0.001 Hz resolution or 
> better). It managed to easily find the switched out LFO bleedthrough 
> (possibly through PSU) in Pro-one. I can send it / analyze wav files if 
> you want.

I don't grab any data with audiocard. I use a good hardware counter which also
has the FFT option in it. My main problem is in the trigger signal having too
bad slope since trigger-jitter is total jitter divided by input slewrate, with
slewrate sssslllooooowwww will additive noise blow my trigger noise away.

Considering a few normal gain-stages followed by some digital gate.

Thanks anyway.

Cheers,
Magnus