Yamaha CS-15D

Yamaha CS-15D Image

This is a partially preset, partially variable monophonic analogue synth which was released in 1979. It was part of a synthesizer range that included the CS-20m, the CS-40m, and the CS-70m. It has a very solid warm sound for a single VCO synth. The preset section is divided into two channels. Channel 1 has 15 sounds with the usual array of unrealistic instrument imitations and Channel 2 has 14 synth sounds plus a button to activate the 'manual' section of the synth. There is a slider to mix between the two channels and channel 2 can be detuned.

The 'manual' section comprises 1 VCO with a variable control between pulse and saw waves. There are also controls for pulse width modulation, noise and footings (32' - 2'). The 12dB filter has cut-off and resonance plus a dedicated ADSR envelope with a control for envelope amount. It has a nice wet and warm sound. There is a separate ADSR for the amplifier.

Most controls to the left of the preset section affect the presets as well as the manual section. These include a modulation section with 1 LFO (sine and square), S/H (random) and repeat. Modulation can be routed to either the VCO, VCF or VCA. There is also a global tuning pot and a performance panel that includes portamento (which isn't very precise) modulation and pitch wheels as well as a 'brilliance' slider. Why a slider for VCF modulation instead of a wheel? God only knows. One feature of the pitch wheel that has synthesists divided is that it doesn't have a spring although a soft 'click' is felt when moved back to the center-point. It can be handy to reach the lowest possible notes without having to hold the wheel in place.

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16 Visitor comments
Automatic Gainsay
August 16, 2008 @ 12:32 pm
While the manual section only has access to one of the voltage controlled filters, there are actually two. We would wish to control both, but even though we can't, a larger diversity of sound is achieved by mixing the manual section with one of the presets.
 
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  • Check Price
  • The link above will take you to an eBay search for this synth to see active listings. If you don't find it there, try looking in our forum marketplace or post a wanted classified.
  • Specifications
  • Polyphony - Monophonic
  • Oscillators - 1 VCO per section
  • LFO - 1 (sine, square, s/h, repeat)
  • Filter - 1 12dB/oct (2-pole) lowpass filter with dedicated ADSR
  • VCA - 1 ADSR
  • Keyboard - 37 keys
  • Memory - 29 presets, no user
  • Control - Dual CV and Gate
  • Date Produced - 1979-1982
  • Resources & Credits
  • Images from here.

    Reviewed November 2007.

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