Hi Tomek

>>A CV-input might be quite difficult, but ist should be easy to add an
>>clock input which should be fed by a highspeed VCO.
> thanks for the answer, could you mail me with more info on that (priv or
> group). i'm not sure how to implement a clock into the signal chain.
> thanks again

The clock is NOT in the signal chain. This clock is a rectangle signal
within the circuitry of the Flanger-stompbox. You have to find it on the
pcb of the dedicated stompbox and then you have to add an kind of insert
jack to this clock-signal.

If you have a stompbox, then have a look which BBD chip it uses. Then
try to get the datasheet for the BBD. Usually the datasheets provide a
basic schematic of application examples. Use this examples to reverse
engineer the real schematic of your stomp box.

Sorry that I cannot help more.

Florian