Hi Ingo

> I could be wrong since I have no person. experience with the WVX and
> only little with the A137. Anyhow, I used to think that the A137 works
> best for signal with none or few harmonics while the WVX works equally
> well on signals which are poor or rich in harmonics. Anyone to clarify

Also the WVX works "best" with signals with poor harmonics. The question
is, what you define as "best". The Doepfer works as a WVX if you don't
use the "multiples" control (or don't overload the input).

Florian