Hi Dieter and Ingo

>>I think I'll get the tools out of the box, Peter's mod sounds niceeee!
>>I was quite surprised about the A133 example, very cool that it sounds
>>so similar to the A114.
> Even I'm very surprised as completely different circuits are used. The A-114
> uses the balanced modulator MC1496 (normally for high frequency
> applications), the A-133 a LM13700 Dual OTA design.

I think this is valid only for the very simple sources of the first
example. Also a resonating VCF crossmodulated by a sine VCO won't sound
much different.
The example with the TR-808 and the continuous sound from the korg shows
clearly the difference between the 114 and the 133.

Florian