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Yamaha CS-70M

(image courtesy of Yamaha)

Released: 1981

MSRP: Y934,500


Dual VCO (second VCO is detunable, but not programmable), microprocessor controlled (vs. CV/Gate) polysynth with elements of several CS series synths. The last major analog synth before Yamaha goes digital. Architecture Class: Conventional (subtractive).

Ebay Description:

The Yamaha CS-70M is a 61 key, 6 voice polyphonic analog synthesizer, featuring dual oscillators (pulse, sine, saw waveforms), noise, resonant low|high|band pass filter, dedicated (ADSR) filter and amp envelopes, LFO (saw:down, sine, S/H waveforms) with dedicated AR envelope, ring modulation, CV/gate outputs, memory strip interface, split point (duotimbral), and 30 editable presets (15 per split).


Form Factor Dimensions Weight Audio Input Audio Output Communication Port Control Input Control Output Switch Input Power
61 keys W:1120mm(44in) H:180mm(7in) D:500mm(19.75in) 28.8kg(63.4lbs) VCF VCA mono:1/2/balanced no Keycode CV gate sustain portamento sequencer AC (110W)


Compatibility Multitimbral Memory Program Memory External Storage External Programming UI Input UI Output
- N/A user:15+15 (battery backup via 3x AA) magnetic-strip:2 memory strip no dedicated sliders/knobs LED


Multitimbral Polyphony Unison Architecture
2 6 yes VCO->VCF->VCA


Effects Pan Modulator Volume Modulator Headphone
chorus tremolo no LFO VCA-EG pedal yes


Arpeggiator Arpeggiator External Sequencer Sequencer Memory Sequencer External Continuous Program Change
no N/A 4 track, step time, with trigger pedal input 128x4 notes pedal pitch-wheel mod-wheel/pedal portamento-slider brilliance-knob/pedal release-slider filter-pedal volume-pedal no


Key Pressure Chord Memory External Control External Sustain Key Scaling Velocity Curves
channel no no pedal no no


Name Signal Class Waveform Octave Range Amplitude Modulator Harmonics Modulator Pitch Modulator Wave Assign Modulator
VCO1 analog pulse saw sine 2-64' no PWM:LFO ring:LFO auto-bend LFO portamento pitch-wheel VCO-EG no
VCO2 analog preset:VCO1 preset:VCO1 no preset:VCO1 auto-bend LFO portamento pitch-wheel VCO-EG no
Noise analog noise no no no no no


Name Signal Class IC Resonant Shape Frequency Modulator Resonance Modulator Shape Modulator
VCF analog IG00156 yes low|high|band pass LFO VCF-EG pedal no no


Name Level Rate Loop Polarity Trigger Level Modulator Rate Modulator
VCF-EG sustain attack decay release no yes key LFO no no
VCA-EG sustain attack decay release no no key LFO no no
LFO-EG - AD no yes key LFO no no


Name Waveform Delay Polarity Sync Delay Modulator Level Modulator Rate Modulator
LFO saw:down sine S/H no no no no aftertouch mod-wheel LFO-EG pedal no
Conventional Models
SY-1 SY-2 CS-10 CS-30 CS-30L CS-50 CS-60 CS-80
CS-5 CS-15 CS-15D CS-20M CS-40M CS-70M CS-01 SK10
SK15 SK20 SK30 SK50D SY-20 AN1x