BUCHLA 100 SERIES

Model 100 Cabinet Specially designed walnut cabinet accommodates power supply and 15 panel units. (Most modules are 4 1/4" x 7" and occupy one panel unit, but some are 8 1/2" or 17" wide and occupy two or four panel units.) Overall dimensions are 23" x23"x8".

Model 106 Mixer Two 3-channel mixers with both separate and common outputs and level controls for each input.

Model 107 Voltage Controlled Mixer Two 5-channel mixers with both separate and common outputs. Input levels are controlled by externally applied control voltages usually derived from a Model 114 touch controlled voltage source.

Model 110 Dual Voltage Controlled Gate Two voltage controlled amplifiers generally used in conjunction with a Model 180 attack generator to control the envelope of applied signals.

Model 111 Dual Ring Modulator Two independent ring modulators. Each output consists of the sums and differences between frequency components of two input signals. Original signals are suppressed about 55 db.

Model 112 Touch Controlled Voltage Source Touch activated keys produce one of twelve preselected voltages at each of two outputs. A third output voltage is proportional to finger pressure, and a fourth output is a pulse generated whenever a key is activated. Generally used to initiate notes and control their pitches.

Model 114 Touch Controlled Voltage Source Ten independent, touch activated keys, each with a corresponding control voltage output and pulse output. The voltage outputs are particularly useful for controlling gates (110) or mixers (107), and the pulse outputs for initiating attack waveforms (180) or other events.

Model 115 Power Supply Regulated supply for powering a cabinetful of modules plus one or two keyboards. Installed in Model 100 cabinet, unit occupies no panel space.

Model 117 Dual Proximity Detector Two capacitance-actuated control voltage sources for enabling spatial control of sound parameters. Theremin-style antennas may be remotely located.

Model 123 Sequential Voltage Source Produces a sequence of two to eight programmed voltages at each of three outputs. Switching is accomplished by applying a pulse, usually from a Model 140 pulse generator. Indicator lamps show which of the 24 potentiometers are in control. Eight pulse outputs are energized as corresponding segments are switched. Unit may be used to simultaneously program pitch, amplitude, and duration of single or repetitive sequences of notes.

Model 124 Patchboard Consists of 24 miniature audio jacks mounted on a panel. Used in studio installations to facilitate connection to tape recorders, monitors, and other auxiliary equipment.

Model 130 Dual Envelope Detector Produces a control voltage proportional to the instantaneous amplitude of an applied signal. Detector time constant is variable from .01 to 1 second.

Model 144 Dual Square Wave Oscillator Two independent oscillators in one unit. Frequencies are continuously variable from 5 cps to 20 kc and may be controlled internally or with externally applied voltages. There is provision for wide band amplitude and frequency modulation.

Model 146 Sequential Voltage Source Produces a sequence of two to sixteen programmed voltages at each of three outputs. Otherwise identical to Model 123.

Model 148 Harmonic Generator Generates a fundamental and its first nine harmonics (harmonic numbers 1 - 10). Fundamental frequency is continuously variable from 5 cps to 5 kc and may be controlled internally or with an externally applied voltage. There is provision for wide-band frequency modulation. The 148 is frequently used in conjunction with mixers (106, 107), gates (110), and attack generators (180) to enable precise programmed envelope control of individual overtones.

Model 150 Frequency Counter Four digit counter measures frequencies to 100kc with a precision of 10cps. Frequencies below 10kc are measured with a precision of 1 cps.

Model 155 Dual Integrator Produces continuous control voltage functions when used in conjunction with sources of discrete control voltages (e.g. keyboards, sequencers). Positive and negative slopes may be individually and continuously varied from 15 volts in .0025 seconds to 15 volts in 10 seconds; either or both slopes may be voltage controlled. Particularly useful for generating complex voltage controlled envelopes, frequency glides, and repetitive control functions.

Model 156 Dual Control Voltage Processor Serves to mix, compress and invert control voltages. Each channel has two control voltage inputs and an internal voltage source. Particularly useful for obtaining fine pitch control, transposition capability, and range compression of control voltage sources.

Model 157 Control Voltage Inverter Four channel unit complements control voltages to accomplish a variety of inverted functions.

Model 158 Dual Sine-Sawtooth Oscillator Two independent oscillators in one unit. Frequencies are continuously variable from 5 cps to 20 kc and may be controlled internally or with externally applied control voltages. Waveshape is continuously adjustable from sine to sawtooth; oscillators may be wideband frequency modulated.

Model 160 White Noise Generator Produces white noise with a flat frequency distribution from 5 cps to 20 kc and weighted noise with a constant power per octave distribution.

Model 165 Dual Random Voltage Source Produces two uncorrelated, random output voltages, each of which is changed by applying a trigger pulse. Used to randomize frequency, amplitude, and time.

Model 170 Dual Microphone Preamplifier Two high-gain mike preamplifiers. Input connectors are 3 pin SLR. Input impedances are selected by a panel mounted switch.

Model 171 Dual Instrument Preamplifier Two preamplifiers for electric guitars, contact microphones, and other low-level signal sources. Input impedances are 200 k (omega symbol); input connectors are standard phone.

Model 172 Dual Signal Leveler Two high-gain, constant-output amplifiers. Output signal levels are maintained at 0 db (plus or minus 1 db) for input variations of from -40db to +10 db. Time constants are variable from .05 to 5 seconds.

Model 175 Dual Equalizer - Line Driver Used in studio installations to drive 600 (omega symbol) headsets or unbalanced lines at a nominal +4db (max. +20db). Unit incorporates bass and treble controls of the variable turnover variety.

Model 176 Dual Hiss Cutter Reduces tape hiss by restricting bandwidth of signals that would otherwise be masked by high frequency noise. Signals above a certain threshold (including fast transients) are unaffected.

Model 180 Dual Attack Generator Two independent units produce envelope control voltages initiated by pulses. Attack time is variable from .002 to 1 second; decay time from .002 to 5 seconds; duration from .002 to 5 seconds. Duration may be optionally controlled by trigger pulse length.

Model 185 Frequency Shifter Shifts frequencies contained in input signal by an amount equal to the applied carrier frequency. Raised and lowered signals are simultaneously available.

Model 190 Dual Reverberation Unit Two independent spring type reverberators. Degree of reverberation is continuously variable.

Model 191 Sharp Cutoff Filter Voltage controlled highpass and lowpass filters with 24db/octave slopes. Cutoff frequencies are variable from 5 cps to 20 kc with no range shifting. Also functions as a band pass filter with voltage controlled center frequency and bandwidth.

Model 192 Dual Lowpass Filter Two lowpass filters with cutoff frequencies variable from 200 cps to 20 kc. Slopes have sharp knees and are 12 db/octave.

Model 194 Bandpass Filter Divides an input signal into four frequency bands. Cross-over frequencies are 200 cps, 900 cps, and 4 kc. Slopes have sharp knees and are 12db/octave.

Model 195 Octave Format Filter Divides an input signal into ten frequency bands centered at octave intervals from 31 cps to 16 kc.

Model 196 Phase Shifter Shifts phase of input signal such that a 90 degree (plus or minus 5 degree) phase relationship between the two outputs is maintained from 5 cps to 20 kc. Used in conjunction with ring modulators for frequency shifting or for exotic visual displays. pp98-99