UBZR1 Analog Keyboard
UBZR1 can be controlled by a classical analog keyboard.
The Analog Keyboard is a stand-alone device with its own electronics.
It connects to UBZR1's Analog Keyboard Interface module.
- 4 1/2 octaves mechanical keyboard that operates wire switches. These
have been sold by the german company "Böhm" as a kit for electronic
organs in the 1970-ies
- Custom made beech wood case
- Pitch bend wheel
- "Kellogg type" switch to shift the pitch voltage 2 V (= 2 octaves)
up or down
- modulation slider with control voltage output
- portamento potentiometer and switch
- No pressure, velocity, after-touch capabilities
- 1 V/octave pitch voltage output; 0 V at middle C
- 0 V, +5 V logic level trigger output
Schematics as PDF or JPG
- Pitch voltage
- Trigger digital voltage
- Modulation "wheel" voltage
The electronic circuit design is inspired by the analog keyboard of
the "Format" synthesizer, published in the Dutch/German electronics
periodical "Elektuur/Elektor" end of the 1970-ies.