Doepfer

> i think that the added features of the a-154 would certainly expand 
> the possibilities of using the sequencer as a "grahic vco", my 
> experiments in this area ( both with a previously owned serge tkb 
> and the a-155 ) have led 
> me to feel that the "graphic vco" idea has merit for control 
> waveforms but 
> when reaching audio frq`s, there isn`t enough variation to merit the 
> extra 
> effort - the standard waveform choices provide a reasonable spread 
> of 
> harmonic series for "day to day" use and the addition of things like 
> linear 
> fm and various waveshapers ( doepfer a-136 is nice, i can also 
> recommend the 
> blacet/wiard  mini-wave ) provide enough extra waveform variety with 
> less 
> effort and less expensive circuitry. 

I dunno, you've probably played with this concept much more than I 
have. I currently have a bank of Regelwerk faders patched to the A155 
via the A191 so it can be used as a true graphic VCO, and biased the 
pre-out jack with a negative voltage. I can get quite dramatic changes 
in the harmonic content by adjusting the faders in real time, and 
I can also record the waveshaping session on a midi sequencer.

It's possible that I could do something very similar with the 
distortion/waveshaper, but it doesn't seem like there would be 
anywhere near as much control. 

In any case, it's a lot of fun.

Joe