Yamaha CS-10 Synthesizer
The Yamaha CS-10 is a monophonic analogue synthesizer. It was released in 1977. It is relatively un-famous, so you can buy it cheaply.
It sounds like this (515 KB)
The specifications are here.
Good things about the Yamaha CS-10 are:
- Very wide pitchbend (+/- one octave)
- Seperate volume controls for square and saw waves, ie. you can blend odd/even harmonics to your satisfaction.
- Multimode (hp/bp/lp) filter.
- LFO goes into audio range (max 100 Hz).
- External audio input w. trigger detector, also ext. CV/trig inputs.
Bad points of the Yamaha CS-10:
- Filter keyfollow is always on.
- If you prefer a 4-pole filter, it only has a 2-pole filter.
- LFO mod of VCO is only +/- 60 cents.
- Linear CV (see below).
CS-10 Control Voltages
The Yamaha CS-10 VCO is based on the IG00153 chip, which is a linear VCO. Here are the control voltages which are produced by the keyboard (with pitch-bend centered).
C1 = 0.25V
C2 = 0.50V
C3 = 1.00V
C4 = 2.00V
The Pitch-Bend is +/- 1 octave, so the maximum range is 0.125V - 4V (ie. 5 octaves).
I have verified these values on my own CS-10 unit.
The Yamaha "Synthesizer Patch Charts" Book for the CS-10/CS-30/CS-30L, is hosted here.