CEM and SSM chips in synthesizers

CEM and SSM chips are analog chips used in many synthesizers.

Curtis Electromusic Specialties

Founded by Doug Curtis (d. 2007), developed a family of signal-processing products for electronic music synthesizers and audio equipment.

ICs

• CEM3310 ENV ADSR
• CEM3312 ADSR + VCA
• CEM3318 ADSR but microprocessor controlled
• CEM3320 24dB/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 12dB/oct Multimode Filter x2 (no notch)
• CEM3360 VCA x2
• CEM3365 DAC
• CEM3371 Envelope x2
• CEM3372 24dB/oct. Filter, Mix, VCA
• CEM3374 VCO x2 (PWMable Pulse, Tri, Saw)
• CEM3378 24dB/oct. Filter, Mix, VCA but microprocessor controlled
• CEM3379 24dB/oct. Filter, Pan, VCA but microprocessor controlled
• CEM3381 VCA x2 linear
• CEM3382 VCA x2 log
• CEM3385 24dB/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

• 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)

Solid State Microtechnologies by solid state music

ICs

• SSM2013 Voltage Controlled Amplifier
• SSM2014 Voltage Controlled Element
• SSM2015 Microphone Preamplifier
• SSM2120/22 Dynamic Range Processor/Dual VCA
• SSM2024 Quad Current Controlled Amplifier
• SSM2033 Voltage Controlled Oscillator
• SSM2044 4-Pole VCF
• SSM2045 Music Voicing System
• SSM2047 Music Voicing System
• SSM2056 Voltage Controlled ADSR type Envelope Generator

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

Banana

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

• Poly Synth: 12x CEM3310 EG, 12x CEM3340 VCO, 12x 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

• Spirit: 2x CEM3340 VCO, 2x CEM3350 Dual VCF, 3x CEM3360 Dual VCA
• Bit 01: 6x CEM3328 VCF Late Models, 6x SSM2044 VCF Early Models
• Trilogy: 6x CEM3310 EG, 6x CEM3320 VCF, 6x CEM3330 Dual VCA, 1x SSM2020 VCA

Doepfer

• A107 Morph. Filter: CEM3379
• A121 Multi Mode Filter/A122 LPFilter/A123 HPFilter: CEM3320
• 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

Elka

• Synthex: 8x CEM3320 VCF

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

Fairlight

• Fairlight CMI II: 8x CEM3320 VCF in earlier versions, 8x SSM2044 VCF in later versions

Fender / Rhodes

• Chroma: 8x CEM3350 Dual VCF, 8x CEM3360 Dual VCA
• Polaris: 6x CEM3374 Dual VCO, 6x CEM3372 uP Signal Processor - CEM3372 Filter/Mix/VCA

Kawai/Teisco

• K3: SSM2044 as in the K3m
• SX-240: 8x SSM2044

Keytek

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

Korg

• MonoPoly: 4x SSM2033 VCO, 1x SSM2044 VCF
• PolySix: 6x SSM2056 EG, 6x SSM2044 VCF
• Poly 61: 6x SSM2056 EG

Linn

• Linndrum: 2x CEM3320 VCF, 1x CEM3360 Dual VCA

Moog

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

Oberheim

• OB8 & OBX-a: 2x CEM3360 Dual VCA, 16x CEM3340 VCO, 16x CEM3310 EG, 16x CEM3320 VCF
• OB-SX: 2x CEM3340 VCO, 1x CEM3320 VCF, 2x CEM3310 EG, 1x CEM3360 Dual VCA
• Matrix 6 & 6R /// Matrix 1000 Both Matrix use 6x CEM3396
• Xpander: 6x 3372 Signal Processor - CEM3372 Filter/Mix/VCA, 6x 3374 Dual VCO, 2x 6809 processors, ?x CEM3320 VCF or equivalent, ?x CEM3372
• OB-1 (same as OBI or OB-I): 2x CEM3310 EG
• Prommer: 1x CEM3328 VCF
• DX: 1x CEM3320 VCF - "Toms" Voice
• Stretch-DX: 3x CEM3328 VCF LPF

PAiA

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

PPG

• Wave 2.0: 8x SSM2044 VCF
• Wave 2.2 / 2.3: 4x CEM3320 VCF, 4x CEM3310 EG

Roland

• SH101 and MC202: 1x CEM3340 VCO
• MKS-20: 5x CEM3360 Dual VCA
• Jupiter 6: 12x CEM3340 VCO, 6x CEM3360 Dual VCA
• MKS-80 (to serial #511800/early models): 8xCEM3340, 4x CEM3360 Dual VCA
• MKS-80 (serial #511800 up/later models): 8x IR-3R03, 4X IR-3R05, 4x CEM3360 Dual VCA

RSF

• Kobol Expander I: 2x SSM2050 VCO, 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
• 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-1 (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, CEM3372 Filter/Mix/VCA
• 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: 3x SSM2020 VCA, 6x SSM2024, 6x SSM2044 VCF
• Opera 6: 6x SSM2024, 2x SSM2031, 6x SSM2044 VCF

Simmons Drums

• SDS9/SDS1000: 3x CEM3394 VC Synth
• SDS8: 5x CEM3372 VC
• SDS5: SSM2044 - 1x per module
• SDS800: 2x CEM3394

Solton

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

Steiner Parker

• EVI: ?x CEM3340 VCO, ?x SSM2040 VCF

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
• Microwave1: 8x CEM3389 VCF,VCA,VCP, 8x CEM3387 VCF,VCA,VCP in later models

See also

Early clients

• E-MU Systems
• Oberheim Electronics (founded by Tom Oberheim)
• Sequential Circuits (founded by Dave Smith)

Synthesis & signal processing

• Polyphonic synthesizer
• Synthesizer
• Signal processing
• Integrated Circuit

External links

• Curtis Electromusic
• Keyboard, A tribute to chip designer Doug Curtis
• Celebrating Silicon Valley's role 'n rock
• Synthmuseum.com paia
• SynthParts.com
• Paul Schreiber
• Germany : Micon Chip Distribution

References

• Curtis Electromusic
• Synthesizer Database by Moogulator