Hi Dieter

> more processor power than expected. E.g. if you want to generate a 100Hz
> sawtooth with 256 steps of resolution you need a update rate of about 25 kHz
> from the processor - not only for one but for all waveform outputs.

Hmm, why do you try to generate it completely with digital means I'd
create a rough waveform and send it through a VC-slewlimiter, where the
slew rate is depending on the frequency of the intended waveform. The CV
for the slewlimiter would be created by the uP itself. A D/A-converter,
a Demux, and a S&H is assumingly already on board.

Florian