Hello Moog, hello Amos.
I Bought a Slimphatty last Week, I love the sound and made several test, and had a badly surprise come to my ears.
I Hear a little noise when oscillator is off and when envelope is playing, I hear that noise too, when I use the Cutoff knob when I want a deep bass line.
http://www38.zippyshare.com/v/86439018/file.html
or this one :
http://www.sendspace.com/file/6fwd9v
I know, all Analog Synthesizer had a background noise that is present in the system. But I wonder if this noise sounds too loud/high ?
My Set :
Oscillator level : 0
Cutoff: Open first, and after close.
Res: Close
No Overload.
Recorded With Rme BabyFace with a Jack Unbalanced from Planet Waves : Pre Amp: 12 gain.
( Sorry for my bad english 
)
Thank You.