[sdiy] Analog polyphony question

[Jon Darby]

Howdy, everyone!
    I was rereading the old Penfold book today where it was comparing modern
synthesis techniques to modern electronic organs. It mentioned the polyphony
is obtained from a single high frequency oscillation and divided down to the
appropriate frequency determined by the key pressed. My question is what
module would be required per key to divide off the frequency of the master
oscillator into the custom frequency before being mixed together to output?
What parts are involved, another oscillator that oscillates at a frequency
based on the frequency of the master? Hmmm, just curious how complex of a
circuit is required at each key. Thanks a ton.

Jon Darby