Hello Dieter

Am 19.11.2014 09:05, schrieb yahoo@... [Doepfer_a100]:

> When the incoming CV falls the CV output becomes negative

This is the pitfall. The output voltage should be always unidirectional,
no matter whether the incoming voltage is rising or falling.

Take the examples that were given.
1. Davids theremin portamento example: The bigger a CV change within a
given time is, the lower the slewrate of a VC-Slew should be (using an
inverter for the CV). With your idea the slew rate would become higher
with rising melodies and lower with falling melodies.

2. My "Keith Emerson" example: The more "excited" the played melody is,
the more a filter should be become opened. With your idea the filter
would be closed instead of beeing opened as soon as the melody is falling.

Florian