Curtis CEM

Curtis CEM
CEM3360 Dual VCA

Curtis CEM 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.

Contents

SSM and CEM

Chips List

SSM
SSM = Solid State Microtechnologies by solid state music
  • 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
CEM
CEM = Curtis Electromusic Specialities
  • 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)

SSM CEM chips in Synthesizers

at least these synths contain SSM CEM Chip (s)

Akai

  • AX80: 6x 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

Cheetah

  • Cheetah MS6: 6x CEM3396 VC Waveshaper

Buchla

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

Fairlight

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

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
  • possibly: 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

Keytek

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

Kawai/Teisco

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

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: 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: 3372 Signal Processor - CEM3372 Filter/Mix/VCA, 6x 3374 Dual VCO, 2x 6809 processors, CEM3320 VCF or equivalent, CEM3372
  • OB-1 (ame as OBI or OB-I): 2x CEM3310 EG
  • Prommer: 1x CEM3328 VCF

Paia

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

PPG PPG Wave (2.0) series used the SSM filter

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

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

Roland

  • SH101 and MC202: 1x CEM3340 VCO, CEM3360 Dual VCA
  • MKS-20: 5x CEM3360 Dual VCA
  • Jupiter 6: 12x CEM3340 VCO, 6x CEM3360 Dual VCA
  • MKS-80 (serial #511800 up, later models): 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
    UPDATE: T8 used 5x CEM3360(4 for polymod 1 for volume)
  • 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 - CEM3372 Filter/Mix/VCA
    UPDATE:

VS used 2x CEM5530,4x CEM5510 (8chan s/h), 2X CEM3365(dual vca for vector mix)

  • Prophet 2000: CEM3379 VCF/VCA
  • Prophet 3000: CEM3387
  • Studio 440: 8x CEM3389 VC Signal Processor, 1x CEM3360 Dual VCA, 1x CEM5530 30ch Sample/Hold

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　SMM2045 (VCA+VCF)

Steiner Parker

  • EVI: CEM3340 VCO -SSM2040 VCF

Synton

  • Synrix: 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 CEM3387 VCF,VCA,VCP, (later models) 8x CEM3389 VCF,VCA,VCP

See also

early clients
synthesis & signal processing

External links


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