# CEM SSM Synthesizer

## CEM and SSM chips

### CEM ICs

CEM3310 ENV ADSR

CEM3312 ADSR + VCA

CEM3318 ADSR (microprocessor-controlled via two voltages)

CEM3320 24 dB/Oct. VC multimode filter

CEM3328 24 dB/Oct. VC LPF

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. VCF, 2-channel mixer, VCA

CEM3379 24 dB/oct. VCF, VCA, VC pan

CEM3381 / PDA381 VCA x2 linear

CEM3382 / PDA382 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, VCA, VC Pan

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

CEM3394 Microprocessor Controllable: VCO, VCF, VCA, external input (complete synth voice)

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

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. Originally labelled MS1215 and designed for Marion Systems MSR-2. Relabeled as PA397 for DSI.

CEM5508 / PD508 Octal Sample&Hold (8x)

CEM5530 30ch multiplex sample&hold (Prophet VS)

### SSM ICs

SSM2000 Dual Linear-Antilog Voltage Controlled Amplifier 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

AX60: 6x CEM3394 uP Voice

AX73: 6x CEM3394 uP Voice

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

S950: 8x 3387 (Marion Systems MS-9C upgrade only)

VX90: 6x CEM3394 uP Voice

VX600: 12x CEM3374B (IC1), 12x 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

### EEH (Electronic Engineering Hoffmann/Hopf)

Banana: 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

MS6: 6x CEM3396 VC Waveshaper

### Crumar

Bit 01: Bit 01: 6x CEM3328 VCF

Bit 99: Bit 99: 6x CEM3328 VCF

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

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

Performer-2: SSM2040, SSM2050

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

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

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

### 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

A-105 24db SSM Low Pass Filter: SSM2044

A-106-6 XP Filter: CEM3379

A-107 Morph. Filter: CEM3379

A-109 VC Signal Processor: CEM3379

A-111-1 High End VCO: CEM3340

A-111-2 High End VCO II/A-111-3 Micro Precision VCO: CEM3340

A-111-4 Quad Precision VCO: CEM3340

A-111-5 Mini Synthesizer Voice: CEM3394

A-121 Multi Mode Filter/A122 LPFilter/A123 HPFilter: CEM3320

A-122 LPFilter: CEM3379 in later versions

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

A-132-3 Dual Lin/Exp VCA: CEM3360 (early versions)

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

### Dynacord

Add-one: 8x CEM3389

### E-MU

Drumulator: 2x SSM2044

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

Emulator-I: 4x SSM2044

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

SP-12: 2x SSM2044

SP-1200: 2x SSM2044

### Elka

EK-22: 6x CEM3396 VC Waveshaper

Synthex: 8x CEM3320 VCF

### Ensoniq

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

Mirage: 8x CEM3328 VCF

SDP-1: 10x CEM3328 VCF

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

### 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

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

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

### Forat

F9000: 4x CEM3320 VCF

### Hohner

L/D160: 2x CEM3391, 2x SSM2024

P120N: 2x SSM2044

PK120/150: 1x CEM3391, 2x SSM2024

PK/MR250: 2x CEM3391, 2x SSM2024

### 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

Poly-61: 6x SSM2056 EG

Polysix: 6x SSM2056 EG, 6x SSM2044 VCF

Trident MK1: 9x SSM2044 VCF

Trident MK2: 9x 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

DMX: 4x CEM3320 VCF – “Conga”, “Timbale”, “Toms”, “Noise” Voices

DPX-1: 1x SSM2013 VCA, 8x SSM2045 VCF, 5x SSM2300

DX: 1x CEM3320 VCF – “Toms” Voice

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

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

Matrix-1000: 6x CEM3396 (narrow version)

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

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

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

Prommer: 1x CEM3328 VCF

Stretch-DX: 3x CEM3328 VCF LPF

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

### Octave Plateau

The Cat SRM: 1X SSM2040 VCF

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

### PAiA

9601 Stereo Compressor: 1x SSM2120

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

### PPG

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

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

### Roland

CMU-810: 1x CEM3340 VCO

DDR-30: 6x DEM3360 Dual VCA

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

MC-202: 1x CEM3340 VCO

MKS-20: 5x 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)

SH-101: 1x CEM3340 VCO

### RSF

Kobol: 2x SSM2050 EG, 1x SSM2040 VCF

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

### Sequential Circuits

Drumtraks: 2x CEM3320

MAX: 6x CEM3394 uP Voice

Multi-Trak: 6x CEM3394 uP Voice

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

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-5 Rev 4: CEM3320, CEM3340, SSI2140

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

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

Prophet 2000: 8x CEM3379 VC Signal Processor

Prophet 3000: CEM3387

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

Prophet VS: 4x CEM5510 Fast Sample/Hold, 2x CEM5530 30ch S/H, 8x CEM3379/CEM3389 VC Signal Processor, 2x CEM3365 Dual DAC Multiplier, 1x CEM3360 VCA

Six-Trax: 6x CEM3394 uP Voice

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

Split8: 8x CEM3394 uP Voice

### Siel

DK-80: 2x SSM2045 VCF

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

EX-80: 1x SSM2045 VCF

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

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

### Simmons Drums

MTX9: 1x SSM2300

SDS5: SSM2044 – 1x per module

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

SDS9/SDS1000: 3x CEM3394 VC Synth, 1x CEM3372 (SDS9)

SDS8: 5x CEM3372 VC

SDS200: 2x CEM3394

SDS400/SDS800: 4x CEM3394

### Solton

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

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

TS3: 3x CEM 3360, 2x SSM 2300

TS4: 1x CEM 3360, 2x SSM 2300

### Steiner Parker

EVI: 1x CEM3340 VCO, 1x 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

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

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

### Wersi

Spectra-DX series : 1x SSM2045