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Sequential_Circuits Six-Trak

Six-Trak (image courtesy of SoundDoctorin)

Released: 1984

MSRP: $895US


Z80/CEM3394 based synth with a predominantly digital User Interface (i.e. no more dedicated knobs). Multitimbral (via sequencer), single oscillator P600. Architecture Class: Conventional (subtractive).

Ebay Description:

The Sequential Circuits Six-Trak is a 49 key, 6 voice multitimbral (via sequencer) analog synthesizer, featuring a programmable oscillator, resonant low pass filter (24dB CEM), 3 envelopes, and LFO, along with 100 program memories, arpeggiator, 6 track (800 note) sequencer, and MIDI.


Form Factor Dimensions Weight Audio Input Audio Output Communication Port Control Input Control Output Switch Input Power
49 keys H:1.5in W:28in D:12in 17.5lbs no stereo (TRS) MIDI: IN OUT no no sequencer start/stop wired


Compatibility Multitimbral Memory Program Memory External Storage External Programming UI Input UI Output
Six-Trak Max Split-Eight Multi-Trak no 100 no MIDI SysEx menu driven LCD display


Multitimbral Polyphony Unison Architecture
6 (via sequencer) 6 yes VCO+Noise->VCF->VCA


Effects Pan Modulator Volume Modulator Headphone
no no VCA-EG shared


Arpeggiator Arpeggiator External Sequencer Sequencer Memory Sequencer External Continuous Program Change
up/down latch pedal 6 track, 2 song 800 note pedal MIDI Pitch-Wheel Mod-Wheel no


Key Pressure Chord Memory External Control External Sustain Key Scaling Velocity Curves
no no MIDI no yes no


Name Signal Class Waveform Octave Range Amplitude Modulator Harmonics Modulator Pitch Modulator Wave Assign Modulator
VCO analog pulse saw triangle 4 no PWM:LFO glide LFO MIDI-Pitch Pitch-Wheel VCO-EG
Noise analog noise - no no no


Name Signal Class IC Resonant Shape Frequency Modulator Resonance Modulator Shape Modulator
VCF analog CEM3372 yes 24dB low pass key LFO VCF-EG VCO:triangle no


Name Level Rate Loop Polarity Trigger Level Modulator Rate Modulator
VCO-EG sustain attack decay release no yes no no no
VCA-EG sustain attack decay release no no no no no
VCF-EG sustain attack decay release no no no no no


Name Waveform Delay Polarity Sync Delay Modulator Level Modulator Rate Modulator
LFO square triangle no no no Mod-Wheel MIDI-CC1 no
Conventional Models
Prophet 5 Prophet 10 Pro-One Prophet 600 Prophet T8 Fugue Prelude Velocity 6
Six-Trak Max Multi-Trak Split-Eight Prophet VS Prophet VS Rack