Doepfer

Hi,

> Where can I find info on making gate and cv circuits? 
For creating a gate you simply might use the A-119 external input module 
or the A-167 comparator module.

For the CV it is not that easy. I would recommend to use a ready made
Fq/CV converter (as far as I remember Roland or Korg produced some in 
the eighties).

An analogue Fq/CV-converter works like the following:

1.) Try to use a mainly sine or triangle like input wave
2.) Remove DC from the signal
3.) Clip the signal  -> this will create a rectangle wave
4.) differentiate the signal -> this will produce a spike-like signal 
similar to a very narrow pulse, but with positive and negative spikes.
5.) rectify the signal -> this will create positive spikes only.
6.) do a DC-coupled lowpass filtering -> this creates the CV.

Florian