Buchla 200e [system 1.5]

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" 201e - 4-panel Powered Boat w. upgraded 24-space PSU (rack ears included)

206e - Mixer/Preset Manager w. rear panel 1/4" output expansion
A six input, two output mixer with controls for level and stereo location. Two of the locations can be voltage controlled; the remaining four can be continuously panned.

A preset manager is also incorporated as well as dual 1/4" rear panel output.

261e - Complex Waveform Generator
The Model 261e Complex Waveform Generator features voltage-controlled modulation of pitch, amplitude, and timbre, and a multi-dimensional, voltage-controlled timbre space. All of the 261e's timbre processing is performed by analog circuitry, thus eliminating the aliasing that can be introduced by waveshape table driven systems.

A separate modulation oscillator can be synchronized to the principal oscillator or to note-on MIDI messages. Its waveshape is voltage controllable, and can be continuously varied from sine to pulse. The modulation oscillator can track the pitch of the principal oscillator with variable offset.

In conjunction with the model 225e MIDI Manager, the 261e's pitches respond to internally routed MIDI messages. Up to four 261's can peacefully co-exist in a single system, each with its private MIDI channel.

As in all 200e series modules, the settings of the 261e's pots and switches can be memorized as a part of a preset configuration.

266e - Source of Uncertainty
The Model 266e Source of Uncertainty is a general source of musical unpredictability. Divided into 4 sections, each section serves a unique function.

Noise comes in three flavors. 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.

Fluctuating Random Voltages are continuously variable, with voltage control of bandwidth over the range of .05 to 50 Hz, making possible changes that vary from barely perceptible movement to rapid fluctuation.

Quantized Random Voltages change on receipt of pulses. Their number of states is voltage controllable from two to twenty-four, and their distribution can be varied both spatially and temporally.

Stored Random Voltages have three parameters under voltage control. Degree varies the amount of randomness; chaos alters the distribution from just a little uncertain to total chaos; while skew biases the randomness toward one extreme or the other.

All settings of the 266 may be stored and recalled under control of the model 206e preset manager.

291e - Triple Morphing Filter
The 291e Triple Morphing Filter consists of three voltage controlled filters operating independently or in parallel.

The amplitude, center frequency, and bandwidth of each filter may be independently voltage controlled. Each may be modulated with externally applied signals.

The morphing capability might be described as moving through a series of snapshots of the filter, with each snapshot consisting of a complete description of the filter parameters, and with each parameter continuously varying between snapshots. Morphing is accomplished with an applied voltage, or alternatively can be initiated with a pulse, with each stage time independently set. Up to eight stages may be employed.

A solo switch provides editing convenience, and an expand input allows ready expansion of the filter.

All of the 291e's settings may be stored and retrieved with the model 206e preset manager"