lever that came with the joystick. The joystick sends X and Y values from 0-5V, with the
center at around 2.5V. The knobs near the joystick outputs can scale this output down.
Pitch CV Outputs
There are four pitch CV outputs, colored blue and labeled “P”, for voice 1, 2, 3, and 4.
These produce voltages from 0-10V, with 16-bit precision. These outputs are designed
to produce musical pitches, based on a 12-note scale. The tuning of these pitches is
effected by the V/Oct scaling (1.0V or 1.2V, default is 1.2V), the Fine Scaling (from 0-
200, 100 is no scaling), and the Tuning setting (which selects between 12-note tunings,
such as Equal Temperament and Meantone). When in monophonic keyboard mode,
the first two pitch outputs produce the same pitch, while the third and fourth output
“Ribbon Controller” information – see below for those specifications. When in
sequencer mode, all four pitch outputs send the same information. When in 2 note or 4
note polyphony keyboard mode, the different pitch outputs send the voltages for the
different voices.
Surface-Area CV Outputs
There are four surface-area CV outputs, colored green and labeled “V”, for voice 1, 2, 3,
and 4. These outputs produce voltages from 0-10V, with 12-bit precision, and 10ms
analog smoothing. They are designed so that covering as much surface area as it is
generally possible to cover will produce an output of around 8V. These outputs can be
scaled down with the use of the knob that is mislabeled “scale all”. When in monophonic
keyboard mode, voices 1 and 2 are the same voltages, and 3 and 4 output nothing. When
in sequencer mode, all four voices show the same value. When in 2 or 4 voice polyphony,
the voices each show the value that corresponds to its respective polyphony voice.
Knob A and B Outputs
There are four Knob A outputs, and four Knob B outputs, all of which are colored
purple, one of each for voices 1, 2, 3, and 4. The Knob A outputs correspond to the
values of knobs in the A knob bank, and the Knob B outputs correspond to the values of
knobs in the B knob bank. These outputs can be scaled with the “scale A” and “scale B”
knobs, respectively. When the scale A and scale B knobs are fully clockwise, the knobs
will output values between 0-10V, in 12-bit resolution. When in monophonic keyboard
mode, voices 1 and 2 report the same values, and voices 3 and 4 are unused. When in
sequencer mode, all four voices report the same values. When in 2 or 4-voice polyphony,
the voices reflect the knob values of the polyphony voice. When the
“combined/independent” setting is changed from “independent” to “combined”, the A
knob is fine-tuned by the value of the B knob, and is not affected by the “scale A” knob.
The B output operates normally in “combined” mode.
Gate and Trigger Outputs
Each of the four voices has one Gate (really a gate+trigger), and one Trigger output. The
top jack is the Gate, and the bottom is the Trigger. The behavior of these outputs
depends on the “gate style” setting. When in Buchla style (the default), the Gate output
will pulse at 15V for around 10us, then fall to 7V and hold until a release happens. The
