The 267e combines noise sources, dual random voltage sources, and a simple two-channel filter into a single module.
Three type of noise are available, with corresponding dedicated outputs. White noise is electrically flat, but acoustically balanced toward the high end of the spectrum ( 3 db/octave). Integrated white noise has a low spectral bias (-3 db/octave). Musically flat noise has a flat spectrum (constant energy per octave) and is a particularly useful source for subsequent processing.
Dual Random Voltage sources are provided. Each is continuously variable, with voltage control of bandwidth over the range of .05Hz to 50Hz, making possible changes that vary from barely perceptible movement to rapid fluctuation. Applied pulses sample these voltages, providing stored random voltages with wide time correlations possible. Externally applied control voltages may be randomized to any desired extent.
Two bandpass filters are on board, each supporting voltage control of pitch, bandwidth, and modulation index. The filters’ inputs are normalled to the flat noise source, allowing for easy creation of filtered noise sounds.
All settings of the 267e can be stored and recalled as part of a system preset using the 225e or 206e Preset Manager.
Other modules by Buchla | 206e Mixer / Preset Manager | 207e Mixer / Microphone Preamplifier | 210e Control and Signal Router | 223e Multi-Dimensional Kinesthetic Input / Tactile Input Port | 225e MIDI Decoder / Preset Manager | 227e System Interface | 230e Triple Envelope Tracker / Preamplifier | 250e Arbitrary Function Generator | 251e Quad Sequential Voltage Source | 252e Buchla Polyphonic Rythm Generator | 256e Quad Control Voltage Processor | 266e Source of Uncertainty | 257e Control Voltage Processor | 261e Complex Waveform Generator | 259e Twisted Waveform Generator | 272e Polyphonic Tuner | 266e Source of Uncertainty | 281e Quad Function Generator | 285e Frequency Shifter / Balanced Modulator | 291e Triple Morphing Filter | 292e Quad Dynamics Manager | 296e Spectral Processor | 297 Infinite Phase Shifter