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Yamaha CS-40M

(image courtesy of Yamaha)

Released: 1979

MSRP: Y336,000 ($2195US)


Similar tow a duophonic CS20m, adding ring mod and 12 additional presets, while swapping glide (auto-bend) for a VCO EG Architecture Class: Conventional (subtractive).

Ebay Description:

The Yamaha CS-40M is a 44 key, duophonic analog synthesizer, featuring dual oscillators (pulse, sine, saw and triangle waveforms) with dedicated (AR) envelope, noise, resonant low|high|band pass filter, dedicated (ADSR) filter and amp envelopes, LFO (saw:down|up, sine, square, S/H waveforms), ring modulation, CV/gate IO, tape interface, and 20 editable presets.


Form Factor Dimensions Weight Audio Input Audio Output Communication Port Control Input Control Output Switch Input Power
44 keys W:988mm(38.875in) H:177mm(7in) D:470.5mm(18.5in) 21kg(46.3lbs) VCF VCA mono:low/high/balanced no CV:2 gate:2 CV:2 gate:2 sustain portamento AC (40W)


Compatibility Multitimbral Memory Program Memory External Storage External Programming UI Input UI Output
- N/A user:20 (battery backup via 2x AA) tape no dedicated sliders/knobs LED


Multitimbral Polyphony Unison Architecture
no 2 yes VCO->VCF->VCA


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


Arpeggiator Arpeggiator External Sequencer Sequencer Memory Sequencer External Continuous Program Change
no N/A no N/A N/A pitch-wheel mod-wheel portamento-slider brilliance-knob release-slider volume-pedal filter-pedal no


Key Pressure Chord Memory External Control External Sustain Key Scaling Velocity Curves
no 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 triangle 2-64' no PWM:sine|EG CV LFO portamento pitch-wheel VCO-EG no
VCO2 analog pulse saw sine triangle 2-64' no PWM:sine|EG CV LFO portamento pitch-wheel VCO-EG no
Noise analog noise no no no no no
RMO analog sine - no ring VCO-EG no


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


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


Name Waveform Delay Polarity Sync Delay Modulator Level Modulator Rate Modulator
LFO saw:down|up sine square S/H no no no no mod-wheel VCO-EG
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