Curtis CEM
Curtis CEM chips are analog chips used in many synthesizers. Produced by Doug Curtis (died 1/2007).
Doug is known to the music industry as the founder of Curtis Electromusic Specialties where he developed a family of signal-processing products for electronic music synthesizers and audio equipment.
Doug is the father of the Analog Synthesis Chips. Also producer of CEM chips.
SSM and CEM
SSM - Solid State Microtechnologies by solid state music
Curtis CEM Chips CEM = Curtis Electromusic Specialities
Curtis Chips List
- SSM
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
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, Mix, 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 Ctrld: VCF,VCA,Env (ADSR)
CEM3394 Microprocessor Ctrld: 1 Synth Voice: VCF,VCA,Env (ADSR),VCMix
CEM3396 Microprocessor Ctrld: 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 6 CEM3372 uP Signal Processor -CEM3372 Filter/Mix/VCA AX60 6 CEM3394 uP Voice
- Banana (created by Synthesizerstudio Bonn, since 1999 the SSB is closed..)
Poly Synth 12 CEM3310 EG 12 CEM3340 VCO 12 CEM3360 Dual VCA 6 SSM2044 VCF
- Cheetah
Cheetah MS6 6 CEM3396 VC Waveshaper
- CMI
Fairlight II 8 CEM3320 VCF in earlier versions 8 SSM2044 VCF in later versions
- Crumar
Spirit 2 CEM3340 VCO 2 CEM3350 Dual VCF 3 CEM3360 Dual VCA
Bit 01 6 CEM3328 VCF Late Models 6 SSM2044 VCF Early Models
Trilogy 6 CEM3310 EG 6 CEM3320 VCF 6 CEM3330 Dual VCA 1 SSM2020 VCA
- Doepfer
A107 Morph. Filter: CEM3379 A121 Multi Mode Filter: CEM3320 A122 LPFilter: CEM3320 A123 HPFilter: CEM3320
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)
Und vermutlich - possibly: A111-2 Dyn. VCO CEM3394
Dark Energy , Monophonic Synthesizer (CEM3394)
- Elka
Synthex 8 CEM3320 VCF
- Ensoniq
ESQ1 8 CEM3379 VC Signal Processor Filter/Mix/VCA 1 CEM3360 Dual VCA 4 x SSM2300
Mirage 8 CEM3328 VCF
SQ-80 8 CEM3379 VC Signal Processor - Filter/Mix/VCA 1 CEM3360 Dual VCA 4 SSM2300
CTS-2000 1 CEM5530 30ch S/H 8 CEM3389 VC Signal Processor
- Kawai
K3 SSM 2044 as in the K3m
Kawaii SX-240 uses 8xSSM2044
- Korg
MonoPoly 4 SSM2033 VCO 1 SSM2044 VCF
Korg PolySix 6 SSM2056 EG 6 SSM2044 VCF
Poly 61 6 SSM2056 EG
- Linn
Linndrum 2 CEM3320 VCF 1 CEM3360 Dual VCA
- Moog
MemoryMoog 19 CEM3340 VCO 26 CEM3360 Dual VCA 12 CEM3310 EG
- Oberheim
OB8 & OBX-a CEM3360 Dual VCA 16 CEM3340 VCO 16 CEM3310 EG 16 CEM3320 VCF
OB-SX 2 CEM3340 VCO 1 CEM3320 VCF 2 CEM3310 EG 1 CEM3360 Dual VCA
Matrix 6 & 6R /// Matrix 1000 Both Matrix use six CEM3396
Xpander 3372 Signal Processor - CEM3372 Filter/Mix/VCA 6 3374 Dual VCO 2x 6809 processors Curtis 3320 VCF or equivalent CEM3372
OB-1 (ame as OBI or OB-I) 2 CEM3310 EG
Prommer 1 CEM3328 VCF
- Paia
Proteus 2 CEM3340 VCO 1 CEM3320 VCF 1 CEM3310 EG 1 CEM3330 Dual VCA
- PPG
Wave 2.2 / 2.3 4 CEM3320 VCF 4 CEM3310 EG
Wave 2.0 8 SSM2044 VCF
PPG Wave (2.0) series used the SSM filter
- Fender / Rhodes
Chroma 8 CEM3350 Dual VCF 8 CEM3360 Dual VCA
Polaris 6 CEM3374 Dual VCO 6 CEM3372 uP Signal Processor - CEM3372 Filter/Mix/VCA
- Roland
Roland SH101 and MC202 1 CEM3340 VCO roland sh101 MKS-20 5 CEM3360 Dual VCA
Jupiter 6 12 CEM3340 VCO 6 CEM3360 Dual VCA
MKS-80 Serial #511800 up (later models) 4 CEM3360 Dual VCA
- RSF
Kobol Expander I 2 SSM2050 VCO 1 SSM2040 VCF
- Sequential Circuits / Dave Smith INSTRUMENTS
Evolver Series Curtis for Filters
VS 1 CEM5510 Fast Sample/Hold 1 CEM5530 30ch S/H 8 CEM3382 Dual Low Noise VCA 8 CEM3378 VC Signal Processor - CEM3372 Filter/Mix/VCA UPDATE: VS used 2 x CEM5530,4 X CEM 5510 (8chan s/h),2 X CEM3365(dual vca for vector mix)
PROPHET 5 - the first Prophet 5 series used the SSM filter, later they were changed to CEM Prophet 5 Rev 3 11 CEM3340 VCO 10 CEM3310 EG 5 CEM3320 VCF
Prophet 5 Rev 1 & 2 11 SSM 2030 VCO 5 SSM 2040 VCF 10 SSM 2050 EG 21 SSM 2020 VCA
Prophet 10 22 CEM3340 VCO 20 CEM3310 EG 10 CEM3320 VCF
Prophet 600 12 CEM3340 VCO 6 CEM3372 VCF/VCA 4 CEM3360 Dual VCA
PRO-1 (PRO ONE) 3 CEM3340 VCO 2 CEM3310 EG 1 CEM3320 VCF
T8 16 CEM3340 VCO 8 CEM3372 Signal Processor - CEM3372 Filter/Mix/VCA UPDATE: T8 used 5 x CEM3360(4 for polymod 1 for volume)
Six-Trax 6 CEM3394 uP Voice CEM3372 Filter/Mix/VCA
MAX 6 CEM3394 uP Voice
Split8 8 CEM3394 uP Voice
Studio 440 8 CEM3389 VC Signal Processor 1 CEM3360 Dual VCA 1 CEM5530 30ch Sample/Hold
Prophet 2000 CEM3379 VCF/VCA
Prophet 3000 CEM3387
- Siel
DK600 3 SSM2020 VCA 6 SSM2024 6 SSM2044 VCF
Opera 6 6 SSM2024 2 SSM2031 6 SSM2044 VCF
- Simmons Drums
SDS9, SDS1000 3 CEM3394 VC Synth
SDS8 5 CEM3372 VC
sds5 ssm2044 - 1x per module
sds800 2x CEM3394
- Solton
solton sm100 analogue synthesizer Each voice in the Solton SM100 (6 voices) uses 2xSSM2056 (ADSR) and 1xSMM2045 (VCA+VCF)
- Steiner Parker
EVI CEM3340 VCO -SSM2040 VCF
- Synton
Synrix 2 CEM3310 EG 2 CEM3340 VCO 2 CEM3350 Dual VCF 1 CEM3360 Dual VCA
- Waldorf
Wave 16 x CEM PD508 Multiplexer/S&H 16 x CEM 3387 VCA / VCF
Microwave microwave 1 8 CEM3387 VCF,VCA,VCP (later models) 8 CEM3389 VCF,VCA,VCP
Dave Smith and Tom Oberheim
- Dave Smith has a special amount of CEMs for the Evolver series (new ones) but its unique and a special deal... so he will not sell them.
- Tom Oberheim is the inventor of the first polyphonic music synthesizer, a good friend and frequent collaborator of Doug Curtis.
Where to get CEMs
USA : SynthParts.com
Germany : Micon Chip Distribution