CEM and SSM chips in synthesizers

Curtis Electromusic Specialties

Founded by Doug Curtis (d. 2007), developed a family of signal processing products for electronic music synthesizers and audio equipment. In 2016, it was announced that the CEM3340 VCO had been remanufactured by On Chip using the original design.

ICs

CEM3310 ENV ADSR

CEM3312 ADSR + VCA

CEM3318 ADSR but microprocessor controlled

CEM3320 24 dB/Oct. Filter (multi)

CEM3328 same but LPF only

CEM3330 exp/lin VCA

CEM3335 exp VCA

CEM3340 VCO (Saw,Tri,Pulse)

CEM3345 VCO (Saw,Tri,Pulse) with comparator

CEM3350 12 dB/oct Multimode Filter x2 (no notch)

CEM3360 VCA x2

CEM3365 DAC

CEM3371 Envelope x2

CEM3372 24 dB/oct. Filter, Mix, VCA

CEM3374 VCO x2 (PWMable Pulse, Tri, Saw)

CEM3378 24 dB/oct. Filter, Mix, VCA but microprocessor controlled

CEM3379 24 dB/oct. Filter, Pan, VCA but microprocessor controlled

CEM3381 VCA x2 linear

CEM3382 VCA x2 log

CEM3385 24 dB/oct Filter (LoFi)

CEM3387 signal processor 3-4 pole cascade Filter, VC Pan/VCA

CEM3389 signal processor 4 pole Filter, VC resonance, VC Pan/VCA

CEM3391 Microprocessor Controllable: VCF,VCA,Env (ADSR)

CEM3394 Microprocessor Controllable: 1 Synth Voice: VCF,VCA,Env (ADSR),VCMix

CEM3396 Microprocessor Controllable: Wave-Shaper x2 - VCF,VCA

MS1215 (Designed for Marion Systems, Pro Synth) relabeled as PA397 for DSI, orginated as CEM3397 same core design as CEM3396

but with separate external signal (noise/sub/wavetable) input and VCA to mix stage and additional Pan VCA and L/R output stage.

PA381 VCA (low noise)

PA382 VCA (low noise)

PD508 S/H (8x)

5508 predecessor of PD508 same function

5530 30ch multiplex sample&hold (Prophet VS)

ICs

SSM2013 Voltage Controlled Amplifier

SSM2014 Voltage Controlled Element

SSM2015 Microphone Preamplifier

SSM2020 Dual VCA

SSM2024 Quad VCA

SSM2030 Voltage Controlled Oscillator: Sawtooth, Triangle, Pulse (with PWM) and Soft Sync

SSM2031 High Frequency Oscillator/Voltage to Frequency Converter

SSM2033 Voltage Controlled Oscillator

SSM2038 Voltage Controlled Oscillator: Sawtooth, Triangle and Pulse (with PWM)

SSM2040 4-Section VCF (Exponentially controllable Cutoff over a 10,000 to 1 range, i.e. >13 octaves)

SSM2044 4-Pole VCF

SSM2045 Music Voicing System : VCF (2-Pole and 4-Pole Low Pass) and Mixer/VCA

SSM2047 Music Voicing System

SSM2050 Voltage Controlled Transient Generator

SSM2056 Voltage Controlled ADSR type Envelope Generator

SSM2100 Monolithic Log/Antilog Amplifier

SSM2120/22 Dynamic Range Processor/Dual VCA

SSM2164 Low Cost Quad VCA (16 pins, intended to replace the SSM2024, although not a drop-in replacement)

SSM2300 8-Channel Multiplexed Sample&Hold

List of synthesizers and which CEM/SSM ICs they use

Akai

AX80: 8x CEM3372 uP Signal Processor -CEM3372 Filter/Mix/VCA

AX60: 6x CEM3394 uP Voice

AX73: 6x CEM3394 uP Voice

VX90: 6x CEM3394 uP Voice

VX600: 6x CEM3374B (IC1), 1x CEM3378 (IC5), 9x SSM2300 (IC 10-14 & IC 20-23)

Aries System 300 modular

AR-338 oscillator: 1x SSM2030

AR-341 dual oscillator: 2x SSM2030

AR-344 dual envelope: 2x SSM2050

Banana

Banana created by Synthesizerstudio Bonn, since 1999 the SSB is closed..

Poly Synth: 12x CEM3310 EG, 12x CEM3340 VCO, 18x CEM3360 Dual VCA, 6x SSM2044 VCF

Buchla

296 Programmable Spectral Processor: 8x SSM2020 VCA, 1x CEM3360 Dual VCA

Cheetah

Cheetah MS6: 6x CEM3396 VC Waveshaper

Crumar

Performer-2: SSM2040, SSM2050

Trilogy: 6x CEM3310 EG, 6x CEM3320 VCF, 6x CEM3330 Dual VCA, 1x SSM2020 VCA

Stratus: 6x CEM3310 EG, 6x CEM3320 VCF, 6x CEM3330 Dual VCA, 1x SSM2020 VCA, 1x SSM2055

Composer: 2x CEM3310 EG, 2x CEM3320 VCF, 2x CEM3330 Dual VCA

Spirit: 2x CEM3340 VCO, 2x CEM3350 Dual VCF, 3x CEM3360 Dual VCA

Bit 01: 6x CEM3328 VCF Late Models, 6x SSM2044 VCF Early Models

Bit 99: 6x SSM 2044 chips as the VCFs

Digisound-80 modular

80-2 VCO: CEM3340 VCO

80-3 VC LFO: CEM3340 VCO

80-4 VC Mixer: 3x CEM3330 dual VCAs

80-6 VCF: CEM3320 VCF

80-7 VC State Variable Filter: SSM2040 VCF

80-7A VC State Variable Filter: CEM3320 and CEM3335

80-8 Dual ADSR: 2x SSM2050 EGs

80-9 Dual VCA: CEM3330 dual VCA

80-10 Voltage Controlled Envelope Generator: CEM3310 EG

80-16 Dual Resonant Filter: CEM3350 dual VCF

80-18 Dual Multi-Function EG: 2x CEM3310 VCEGs

80-19 Dual VC LFO: CEM3374 and CEM3360

80-C9 Voice Card: 2x CEM3310 VCEGs, 2x CEM3340 VCOs, CEM3360 dual VCA, CEM3372 signal processor

Doepfer

A107 Morph. Filter: CEM3379

A121 Multi Mode Filter/A122 LPFilter/A123 HPFilter: CEM3320

A122 LPFilter: CEM3379 in later versions

A-105 24db SSM Low Pass Filter: SSM2044

A-106-6 XP Filter: CEM3379

A-109 VC Signal Processor: CEM3379

A-111-1 High End VCO: CEM3340

A-130 VCA (linear)/A-131 VCA (exp.)/A-134 VC Panning: CEM3381

A111-2 Dyn. VCO uses CEM3394

Dark Energy, Monophonic Synthesizer: CEM3394 (original model only)

E-MU

Drumulator: 2x SSM2044

SP-12: 2x SSM2044

SP 1200: 2x SSM2044

Emulator-I: 4x SSM2044

Emulator-II: 8x SSM2045 (24 dB/oct analog 4-pole low pass resonant filter (LPF))

Emax: 4x SSM2300 (Sample/Hold Mux), 8x SSM2047 (Filter/Amp)

Elka

Synthex: 8x CEM3320 VCF

EK-22: 6x CEM3396 VC Waveshaper

Ensoniq

ESQ1: 8x CEM3379 VC Signal Processor Filter/Mix/VCA, 1x CEM3360 Dual VCA, 4x SSM2300

Mirage: 8x CEM3328 VCF

SQ-80: 8x CEM3379 VC Signal Processor - Filter/Mix/VCA, 1x CEM3360 Dual VCA, 4x SSM2300

SDP-1: 8x CEM3328 VCF

Fairlight

Fairlight CMI II/IIx: 8x CEM3320 VCF in earlier versions, 8x SSM2045 VCF in later versions

Fender / Rhodes

Chroma: 8x CEM3350 Dual VCF, 8x CEM3360 Dual VCA

Polaris: 6x CEM3374 Dual VCO, 6x CEM3372 Filter/Mix/VCA

Forat

Forat F9000: 4x CEM3320 VCF

Hohner

P120N: 2x SSM2044

Kawai/Teisco

K3(m): 6x SSM2044

SX-210: 8x SSM2044

SX-240: 8x SSM2044

Keytek

CTS-2000: 1x CEM5530 30ch S/H, 8x CEM3389 VC Signal Processor

Korg

Mono/Poly: 4x SSM2033 VCO, 1x SSM2044 VCF

Polysix: 6x SSM2056 EG, 6x SSM2044 VCF

Poly-61: 6x SSM2056 EG

Trident: 8x SSM2044 VCF

Linn

LinnDrum: 2x CEM3320 VCF, 1x CEM3360 Dual VCA

Linn 9000: 4x CEM3320 VCF

Moog

Memorymoog: 19x CEM3340 VCO, 26x CEM3360 Dual VCA, 12x CEM3310 EG

Oberheim

OB-8 & OB-Xa: 2x CEM3330 VCA (Some OB-Xa models), 2x CEM3360 Dual VCA, 16x CEM3340 VCO, 16x CEM3310 EG, OB-Xa 16x CEM3320 VCF, OB-8 8x CEM3320 VCF

OB-X: 16x CEM3310 EG (2 per voice)

OB-SX: 2x CEM3340 VCO, 1x CEM3320 VCF, 2x CEM3310 EG per voice

Matrix-6 & Matrix-6R: 6x CEM3396

Matrix-1000: 6x CEM3396 (narrow version)

Matrix-12: 12 x CEM3374 Dual VCO, 12 x CEM3372 Filter/Mix/VCA

Xpander: 6x CEM3374 Dual VCO, 6x CEM3372 Filter/Mix/VCA

OB-1 (same as OBI or OB-I): 2x CEM3310 EG

Prommer: 1x CEM3328 VCF

DX: 1x CEM3328 VCF - "Toms" Voice

Stretch-DX: 3x CEM3328 VCF LPF

Octave Plateau

The Cat SRM: 1X SSM2040 VCF

Voyetra Eight: 8X SSM2024 VCA, 8X SSM2044 VCF, 16X CEM3340 VCO

PAiA

Proteus: 2x CEM3340 VCO, 1x CEM3320 VCF, 1x CEM3310 EG, 1x CEM3330 Dual VCA

PPG

Wave 2.2 / 2.3: 8x SSM2044 VCF, 4x CEM3360 VCA

Wave 2: 8x CEM3320 VCF, 8x CEM3310 EG

Roland

SH-101 and MC-202: 1x CEM3340 VCO

MKS-20: 5x CEM3360 Dual VCA

Jupiter-6: 12x CEM3340 VCO, 6x IR3109 VCF, 6x CEM3360 Dual VCA

MKS-80 (to serial #511799/early models): 16x CEM3340 VCO, 8x IR3109 VCF, 8x CEM3360 Dual VCA (4 for X-Mod)

MKS-80 (serial #511800 and higher/later models): 16x IR3R03 VCO, 8x IR3R05 VCF/VCA, 4x CEM3360 Dual VCA (for X-Mod)

RSF

Kobol Expander I: 2x SSM2050 EG, 1x SSM2040 VCF

Sequential Circuits / Dave Smith Instruments

Evolver series: Curtis for Filters

Prophet-5: the first Prophet 5 series used the SSM filter; later they were changed to CEM

Prophet-5 Rev 1 & 2: 11x SSM2030 VCO, 5x SSM2040 VCF, 10x SSM2050 EG, 21x SSM2020 VCA

Prophet-5 Rev 3: 11x CEM3340 VCO, 10x CEM3310 EG, 5x CEM3320 VCF, 14x CA3280 VCA

Prophet-10: 22x CEM3340 VCO, 20x CEM3310 EG, 10x CEM3320 VCF

Prophet 600: 12x CEM3340 VCO, 6x CEM3372 VCF/VCA, 4x CEM3360 Dual VCA

Pro-One: 3x CEM3340 VCO, 2x CEM3310 EG, 1x CEM3320 VCF

Prophet T8: 16x CEM3340 VCO, 8x CEM3372 Signal Processor - CEM3372 Filter/Mix/VCA

Six-Trax: 6x CEM3394 uP Voice

Multi-Trak: 6x CEM3394 uP Voice

MAX: 6x CEM3394 uP Voice

Split8: 8x CEM3394 uP Voice

Prophet VS: 1x CEM5510 Fast Sample/Hold, 1x CEM5530 30ch S/H, 8x CEM3382 Dual Low Noise VCA, 8x CEM3378 VC Signal Processor, ?x CEM3372 Filter/Mix/VCA

Prophet 2000: CEM3379 VCF/VCA

Prophet 3000: CEM3387

Studio 440: 8x CEM3389 VC Signal Processor, 1x CEM3360 Dual VCA, 1x CEM5530 30ch Sample/Hold

Drumtraks: 2x CEM3320

Siel

DK600: 2x SSM2031 VCO, 6x SSM2024 VCA, 6x SSM2056, 6x SSM2044 VCF

DK-80: 2x SSM2045 VCF

EX-80: 1x SSM2045 VCF

Opera 6: 2x SSM2031 VCO, 6x SSM2024 VCA, 6x SSM2056, 6x SSM2044 VCF

Kiwi: 2x SSM2031 VCO, 6x SSM2024 VCA, 6x SSM2056, 6x SSM2044 VCF

Simmons Drums

MTX9: 1x SSM2300

SDS9/SDS1000: 3x CEM3394 VC Synth

SDS8: 5x CEM3372 VC

SDS7: CEM3340 - 1x per module; CEM3372 - 1x per module

SDS5: SSM2044 - 1x per module

SDS800: 4x CEM3394

Solton

SM100 analogue synthesizer (6 voices)： Each voice uses 2x　SSM2056 (ADSR) and 1x　SSM2045 (VCA+VCF)

Programmer 24： 1x CEM3350 12 dB Dual VCF & 1x SSM2044 24 dB VCF

Steiner Parker

EVI: ?x CEM3340 VCO, ?x SSM2040 VCF

Suzuki

SX-500: 1x SSM2045 (this synth module is a clone of the SIEL EX-80)

Synton

Syrinx: 2x CEM3310 EG, 2x CEM3340 VCO, 2x CEM3350 Dual VCF, 1x CEM3360 Dual VCA

Waldorf

Wave: 16x CEM PD508 Multiplexer/S&H, 16x CEM 3387 VCA/VCF, 1x Quad VCA SSM2024 for 4 voices.

Microwave1: 8x CEM3389 VCF,VCA,VCP in Rev A, 8x CEM3387 VCF,VCA,VCP in Rev B