Wiardgroup

> 
> The switching frequency is 44.1 Khz. To avoid aliasing 
> (ultrasonic ring modulation) there are 24 dB/Octave 20 Khz guard 
> filters on the input and output. At least in theory, the entire system 
> should be linear and will not produce distortion unless the Q 
> control is up. Q is actually regeneration, or taking the output and 
> mixing it in with the input (Regeneration would not fit on the 
> panel). Since you are adding the output back into the input, this 
> produces gain which can lead to distortion (clipping).



Thanx for the explanation!  _very_ interesting!

r