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Snyderphonics JD-1 Custom Keyboard/Sequencer
Reference Manual
Power Supply
The power supply provided is a triple output desktop supply, with +5V, +15V and -15V
outputs. The connector is a 5-pin DIN circular connector. The power input jack is on
the left side of the wooden case, and the toggle switch next to it turns the keyboard on
and off (up is on, down is off).
Ground Connection
The black banana jack on the side of the wooden case next to the power supply and
on/off switch is a GND connection. When using the JD-1 to control an analog
synthesizer, connect this GND jack to your synthesizer with a banana cable.
FEATURES:
Keyboard
The keyboard is made up of 32 anodized aluminum keys that operate as capacitive touch
sensors.
Knob Banks A ad B
There are 64 knobs above the keyboard, organized into two knob banks, labeled A and B.
Each key has an A knob (top), and a B knob (bottom).
Joystick
The joystick is a spring return Doepfer-style joystick. The aluminum joystick lever is
included in a Ziploc bag wrapped with the power supply. I've also included the plastic
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Table of Contents
Summary of Contents for Snyderphonics JD-1
- Page 1 The black banana jack on the side of the wooden case next to the power supply and on/off switch is a GND connection. When using the JD-1 to control an analog synthesizer, connect this GND jack to your synthesizer with a banana cable.
- Page 2 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.
- Page 3 7V. Sequencer/Keyboard button This button changes the JD-1 from operating in keyboard mode, where the user plays the keyboard with monophonic or polyphonic handling, to sequencer mode, where the JD-1 steps through stages when it receives a clock pulse, and the user can guide this sequencer action using the keyboard.
- Page 4 Internal Sequencer Clock Speed knob This knob is mislabeled “waveform” since it was originally intended to be for the internal synthesizer, which doesn’t exist yet. I put it to use as a speed control for the internal sequencer clock, which is selected as the sequencer clock by default. Internal Sequencer Clock Randomness knob This knob is mislabeled “filter”...
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Page 5: Midi Out
“Program” section of the panel. MIDI Out The JD-1 sends MIDI messages out the MIDI out jack. In monophonic keyboard mode or sequencer mode, everything will be on MIDI channel 1. In the polyphony modes, MIDI channels correspond to polyphony voices (using channels 1-4). Additionally, the A and B knob banks and the surface-area values are sent out as MIDI continuous controller values. - Page 6 place three fingers close together (index, middle and ring) on the white keys (the naturals) of the keyboard. Slide these fingers as a group along the keyboard (not using the black keys). You will get an approximate output of your position on the keyboard. There is another processed version of this value that appears on the “P”...
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