> 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