Sequential Circuits Six-Trak

Sequential Circuits Six-Trak Image

The Six-Trak is Sequential's beginner synth. It has typical Sequential sounds in an analog six oscillator, six voice synth. It is not fun to program, there is only one knob and you need to assign the parameter you wish to adjust to this knob. The assignment settings for the various parameters are listed in the center of the front panel. It does however feature MIDI with controllers for its parameters to make editing easier using a computer program such as Unisyn or other external MIDI controller.

Sequential Circuits Six-Trak Image

The Six-Trak features two operational modes: Polyphonic Mode and Unison Mode. In Unison mode, with all six oscillators, this baby gets fat, rich, creamy and wild making it an excellent stand-in for Moog-like sounds. Also, the Six-Trak is capable of interesting and complex sound effects, mostly thanks to useful cross modulation and the six oscillators. It also includes a simple 6-channel on-board sequencer (of little usefulness these days). Its biggest limitations were: shortest attack too slow for really percussive sounds, smallest vco frequency adjustment too big for Zawinul-style subtle frequency envelopes & LFO, and the lack of built-in chorus, which would have helped to thicken the rather thin sounds in Polyphonic mode. The SixTrak can be fun and cool but is overshadowed by its cousin - the Multi-Trak. It is used by Überzone and Cirrus.

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43 Visitor comments
May 14, 2012 @ 5:58 pm
Another quirk with the Six-Trak is that the pitch wheel wasn't very well calibrated so in the unison mode the voices would go all chorusy sounding when you bend them. I also seem to remember a mode where you could assign different patches to each of the six oscillators for an even bigger mon sound.
March 14, 2012 @ 2:31 pm
for rac do not 'cry...
The backup battery is exhausted, change _ upload the syex sounds. increase the volume of the patch parameter 34. must play
ciao mik
March 14, 2012 @ 2:07 pm
My synth has been unused for about 10 years and now when I switch it on it does that "problem" count from 1 through to 6 which the manual says I need to talk to Sequential Circuits about. Anyone know how to get a sound out of it now? Please?! Really want to get back the fun I've had with it.
January 22, 2012 @ 9:58 pm
the sequencer might be basic, but fortunately the MIDI spec is great, especially for 1983 - love being able to control every parameter by MIDI CC, and when put in OMNI mode (track record + select 4), you can program and sequence the six voices separately, each on its own MIDI channel (channel 3 for voice 1, channel 4 for voice 2, etc). on top of that, the sound is very unique and inviting to my ears.. fat oscillators, squelchy filter, punchy VCA, poly portamento, filter cross mod, PWM.. i'll never sell this thing!
prosper donge
January 22, 2012 @ 4:08 pm
my first synth, bought in `87. for years i only used this synth with an echolette. all rubber buttons went bad, so i used a screwdriver to touch down the buttons for changing sounds or for programming. and it survived and still sings. now 20 years later i use a "IBK 10 control" to control it. a BCR2000 will surely do this job too.
i dont like it, when people start to "glorify" a synth more than it deserves. the sixtrak is good, but it will not save your creativity. in 2012 the onbord sequencer is totally outdated and in general it will not sound like something you never heard bevor.
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  • Check Price
  • The link above will take you to an eBay search for this synth to see active listings. If you don't find it there, try looking in our forum marketplace or post a wanted classified.
  • Specifications
  • Polyphony - 6 Voice Polyphony and 6 part Multitimbral
  • Oscillators - 6 VCO's (sawtooth, triangle, variable width)
  • Memory - 100 patches
  • Filter - 24 dB/oct lowpass w/ ADSR envelope
  • VCA - Standard ADSR
  • LFO - Yes
  • Keyboard - 48 keys
  • Arpeg/Seq - Arpeggiator (up/down) and 2-Track sequencer (up to 800 notes)
  • Control - MIDI (all parameters are midi controllable)
  • Date Produced - 1984
  • Resources & Credits
  • Images from

    Additional info submitted by Jeff Learman.

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