[sdiy] Patchable polyphonic synth with FM or AM transmission idea

[Oakley Sound]

 > Synthesizers, not divider organs...

The Korg series approach polyphony with a brute force method of 
providing an oscillator, filter, amplifier and EG per note. The PE-1000 
even goes as far as making the oscillator a VCO, so there's no divide 
down there.

The PS3100 does use divide down by only for the octaves with the top 
octave being generated by twelve individual VCOs. It's probably as close 
to a polyphonic MS-10 as you can get with using any digital note assigners.

The filters are voltage controlled, only one pole on the PE series but 
two pole with resonance on the PS series.

The PE2000 is probably the most organy with a TOG and divider chain 
(albeit three of them) but even that has the separate filter, envelope 
and amplifier per note.

There's also the Polymoog. TOG and divide down (this time just two of 
them) but independent filters, envelopes and amplifiers per note.

They're all synths but if anything they are good examples why one should 
be using digital in a polyphonic synth if only to bring the cost and 
complexity down. However, the cleverness in all those designs to avoid 
using digital note assignment is something to behold.

Tony

www.oakleysound.com