16 Aug
2004
16 Aug
'04
3:25 p.m.
On Monday 16 August 2004 18:23, Jens M Andreasen wrote:
Now please tell us, what is this synth of yours that
you have
disassembled? Is this circuit part of the output-stage or is it part of
the individual oscillators? Inquiring minds wants to know!
It's the TR-909 drum machine.
For the Bass Drum part, the wave shaper converts the triangle output of a VCO
to a sine.
For the Rim Shot part, it's in the output stage, where three sine waves of
three different oscillator are mixed (that's why I had three inputs in the
schematic of my first post) and shaped.
For the Snare Drum, Low-, Mid- and High Toms, diode clippers are being used to
transform triangle waves to sine waves.