The LFO can be routed to the VCO, the VCR, and pulse width modulation. Both the VCF's and the VCO's ADSRs can be inverted. In each voice the VCO, VCF, and VCA have their own ADSR envelope generators with variable envelope amounts. The filter is self-resonating and can be modulated by the oscillator. Keyfollow modulation can be set to off, half, or full keyboard. The filter section features controls for the cut-off frequency, and resonance. Each oscillator can be mixed with the noise generator. The VCO has coarse and fine tuning, glide (portamento), and available sawtooth, triangle, and pulse (with pulse width modulation) waveforms. It is also syncable to an external source.Įach voice consists of a single Curtis 3394 chip, which basically contains the entire synth engine (one VCO, a VCF, a VCA, and an LFO) except for the ADSR envelope generators. Also available was a built-in 800 note sequencer consisting of two multitimbral Six-Trak sequences with individual volume controls. Each voice can be programmed to any of 100 internal patches and played (via an external sequencer or external keyboard controller) as a separate monophonic synth. Some say that the SixTrak was the first multitimbral MIDI synth to respond to multiple MIDI channels. The Six-Trak was also designed as a MIDI instrument. Sequential marketed the Six-Trak and its software with their Drumtraks drum machine as a complete MIDI system. The software allowed you to program the voices and the sequencer. Software was available for the Commodore 64 computer, then a very popular home personal computer. It was one of the first multitimbral MIDI instruments designed to be used with a computer. The Six-Trak is a 6-voice, polyphonic, multitimbral, programmable analog synthesizer with MIDI, a squencer, an arpeggiator, and a 4-octave, 49-note (C-C) keyboard. Image courtesy of the archives at Hyperreal Information on the Six-Trak's MIDI implementation, Search the Classifieds for this instrument. (remote controller keyboard for the Prophet-5) Six-Trak Split-8 Prophet-3000 Prophet-T8 Prophet-VS Remote Pro-8 PRO-FX Pro-One Prophet-5 Prophet-10 Prophet-600 Sequential Circuits Instruments Drumtraks Fugue Max Multi-Trak Model 800 TIP: To change Midi channel number hold ENTER and 0 and select channel 1-16 with INC/DECĭata can be saved either to Midi exclusive dump or tape backupīattery replacement is a BR2-3 3V battery - click to enlarge-ĮDIT the original brochure mentions a dedicated software developed for Commodore 64 model 910 for edit on both drumtraks and six-track synth.Home Site Map About Us Contact Us Support Us MIDI each sound is triggered with velocity levels and pads output MIDI with dynamic. analog sync IN at 24 /48 /96 PPQ resolution, but it outputs only at 24 / 48 PPQ SYNC internal frequency tempo range from 40 to 250 BPM, sync mode available in 2 ways: SEQUENCER record in real-time mode or step mode. INTERFACE: the Drumtraks is quite easy to use with big buttons and knobs, all parameters are written on the front panel. Sounds are: bass drum, snare, rimshot, tom (x2), crash cymbal + ride, open/ closed hihat, handclaps, tambourine, cabasa and cowbell.įinally the OS EPROM located on top left is also a 2674. The shortest factory sound uses 2732 EPROM type (32 kb) while longest sounds like crash cymbal gets 4 X 2764 EPROM (64 kb) - It is possible to change the soundset by swapping the eproms. WAVETABLE the drumulator contains 13 PCM waveforms coded at 8 bits resolution stored on socket EPROMS (Erasable Programmable Read Only Memories). TECH: TOM channels are filtered by famous chip Curtis CEM3320 (static) HEAR Pitch tune quantised into 15 different steps. VOICES main core 8 bits NEC D780C-1 CPU part of Z80 ZILOG family manages 6 channels polyphony, each channel features 2 main settings: Programmable drum machines based on PCM samples with early Midi control features.ĭRUM MACHINE Main panel features a segment display, 13 dynamic trigger pads, 9 buttons and numeric pad.
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