A 6-
voice multitimbral analog synthesizer with a 61-
note velocity sensitive
keyboard. Produced from
1985 to
1987.
The Multi-Trak uses a
CEM 3394 chips for each voice. They contain a
VCO, a
VCF, a
VCA, and an
LFO.
The
VCO's
waveform is
switchable between
sawtooth,
triangle and
pwm. A
noise generator is also included. There are controls for
coarse/
fine tuning and
glide.
The
resonant VCF can be
modulated by the VCO. Controls for
cut-off and
resonance are available with 3 modes for
key-follow modulation.
In each voice the VCO, VCF and
VCA have their own
ADSR envelope generators. Apart from the VCA, they can be
inverted.
Multi-Trak's
LFO can be routed to the VCO, the VCF and
pulse width modulation. Available
waveforms are
square and
triangle. LFO controls are
amount and
frequency.
There is a
built-in chorus with controls for
rate and
depth.
Programming the Multi-Trak is done with a single
knob and a 4x10
matrix of
parameter buttons. Each voice can be programmed to one of the 100
internal patches and played via an
external keyboard/
sequencer as a separate
monophonic synthesizer.
The MT features a 1600-note
sequencer with
quantizing and a
metronome. It is syncable to an external
source. Unfortunately there is no
memory for user
sequences, only 4 pre-programmed
demos. There is a
tape interface for storing patches and sequences.
A very
flexible arpeggiator with
latch and
transpose is included. It is switchable between
up,
down and
assignable. The last mode arpeggiates notes in the order they were played.
The
superstak mode allows two or more sounds
stacked to create a
thick monophonic sound. It can also be used as a 3-voice
duophonic stack.
There is also an
auto-tune function which constantly tunes notes not played in the last 30 seconds.
In/out
MIDI is available on the MT. In addition to a normal
stereo audio output (which doubles as a
headphone jack), there are separate outputs for each voice. Also on the
back panel there are jacks for a
pedal controller as well as the
cassette interface.
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