◊ Historic Buchla Modules
Buchla pages > Buchla 200 modules > 237 and 238 Keyboards
Buchla pages > Buchla 200 modules > 237 and 238 Keyboards
* Polyphonic * Velocity Sensitive * Pressure Sensitive
These keyboards provide the musician with the means to achieve direct expressive control of the Electric Music Box's many voltage-controlled parameters.
Model 237 (pictured) has 37 keys (3 octave) and 3 voice polyphonic outputs; Model 238 has 61 keys (5 octaves) and 4 voice polyphonic outputs. built-in processor allows polyphonic output voltages to be transposed or modulated by applied signals and control voltages.
Both models feature velocity and pressure outputs. Velocity output voltages are proportional to initial striking force; pressure outputs are actuated by applying pressure at bottom of key travel.
Key voltage outputs are equal interval -- any equal-tempered scale may be readily tuned with the processing and offset controls built into Electric Music Box oscillators. (Keyboard model 238 can produce any 12-note scale with the help of a Model 246 programmed voltage source)
A separate 6-note, tuned voltage source with individual pulse outputs (useful for presets and event initiations) is incorporated in both models. Model 238 includes a digital output for interfacing with digital computers.