[sdiy] SH2000 mod (wavetables)

[Oakley Sound]

As Mark has correctly stated the SH-2000 is a single linear VCO with a 
divider chain on its output. Various outputs of the chain are added 
together to make various waveforms that are used by the preset sounds. 
There are, of course, no wavetables in the ROM playback sense.

I have seen that online 'review' of the SH-2000 and much like many 
online modifications it promises to be much more than it really is. 
However, the SH-2000 is a very worthy instrument in its own right, 
mostly due to an expressive keyboard and a nice overall sound.

If you do want to mod it, the first thing I would suggest is to analyse 
the various preset sounds. You can alter these by means of changing the 
large diode matrix that controls the preset functions. Grab hold of the 
excellent Service Notes because to do this randomly could be tiresome.

I did give mine a bit of an internal mod though. I changed the filter 
cut-off slider to a proper cut-off function and not the EG sweep it 
actually is. I made the VCF mod slider the EG sweep slider, but with 
increased range. I also changed the growl modulation route so as to use 
the VCO as the source and not the little fixed 30Hz LFO. In this way I 
felt it kept the general character of the instrument but made it more 
useful for my requirements.

Tony

www.oakleysound.com/projects.htm           Oakley Modular Synthesisers