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Developed over the course of three years of research, and utilizing the original documentation, art files, and circuit board specifications from the 1974 original, the limited reissue Moog Sequencer Complement B is an optional expansion cabinet for both the System 35 and System 55 modular instruments. It is housed in a hand-finished solid walnut cabinet and incorporates the expansive musical capabilities of two 960 Sequential Controllers. The unit is a powerful tool for significantly increasing the rhythmic complexity of your musical accompaniment.

Each Sequencer Complement B expansion cabinet is hand-built to its original 1974 Moog factory specifications and is a true re-creation of the original. Individual modules are brought to life just as the originals were, by hand-stuffing and hand-soldering components to circuit boards, and using traditional wiring methods. Each module is then finished with a photo-etched aluminum panel, and placed in its new modular instrument.

This limited reissue of the Moog Sequencer Complement B expansion cabinet is built to order, and is available in limited quantities while parts remain.

The system consists of two 960 Sequential Controllers, one 961 interface, two 962 Sequential Switches, and one 994 Dual Multiples Panel.

960 Sequential Controllers

Consists of a voltage controlled clock oscillator, which drives three rows of eight steps each. Indicator lights show sequence and step position status. A separate potentiometer for each step permits up to eight different voltage settings to be selected for each row. The DC voltage output corresponds to the column of pots below the lighted stage. Voltage range switches for each row determine the DC voltage range of each pot with two volts {X1}, four volts {X2}, or eight volts{X4} maximum extent. Two parallel outputs are provided for each row. Jacks for trigger inputs and outputs appear below each column. Trigger inputs activate that stage independently of the clock oscillator trigger. Trigger outputs are available for any other V-trigger activated input. Manual trigger buttons are included for each of the eight stages {found below the V-trigger jacks}. Switches found immediately below each step position permit normal, skip or stop functions. A ninth position providing skip {continuous progression through the eight steps}or stop {one progression to closure} functions is included at the end of the row. Timing control for the eight steps is accomplished via the Third Row Control of Timing switch. This switch connects the third row of the sequencer into the control input of the clock speed for each stage according to the settings on the third row potentiometers. The Shift input admits an external clock input to the sequencing circuit. This input may be used in addition to or exclusive of the internal clock oscillator trigger. Manual shift from step to step is accomplished with the button next to the shift input jack, as well as individual manual trigger buttons for each step found under each step column. 

Manual buttons or external v-trigger sources initiate the clock oscillator start and stop functions. The clock oscillator is capable of producing frequencies from 0.1 Hz to 1 kHz. It has both octave {range} and vernier {fine adjust} controls. One control input jack is available, as well as one rectangular wave output {approximately 90/10% duty cycle}. The clock oscillator, like other Moog oscillators, is standardized to one volt per octave

961 Interface

Features four independent circuits: one Audio-In to V-trigger Out circuit, one S-trigger In to V-Trigger Out circuit, and two V-trigger In to S-trigger Out circuits. All interface circuits may be used simultaneously, in combination, or separately. 

The Audio to V-trigger circuit generates V-triggers when the audio input level rises above the threshold set on the Sensitivity potentiometer. This V-trigger sensitivity varies with the frequency band of the audio signal and with the frequency of its amplitude peaks. V-trigger duration is commensurate with the length of time the audio signal remains above the sensitivity threshold. Two parallel V-trigger outputs are included. 

The S-trigger to V-trigger circuits converts any Short-to-ground trigger input to a v-trigger output. 

Each V-trigger In to S-trigger Out circuit has two columns of six jacks each for input triggers and one S-trigger output. Column A of the V-trigger inputs will convert V-trigger signals to S-triggers with duration equal to the input. Column B determines S-trigger duration by the Switch-on-time knob ONLY. B Column S-triggers will block, extend or fore-shorten Column B V-trigger inputs to conform to whatever duration is indicated on the B-column potentiometer. A minimum switch-on-time of 40 milliseconds and maximum time of 4 seconds duration is available. Simultaneous inputs to both A and B columns may be made. Simultaneous inputs to two parallel jacks will result in the longer of the two trigger signals being accepted

962 Sequential Switch

Selects between two or three signal inputs, coupling one signal to the output jack at a time. A V-trigger pulse introduced to the Shift Input initiates the sequence. The Sequential Switch will alternate between stages One and Two, disregarding stage three until a standard {tip-sleeve} phone plug is patched into Signal Input Three. A connection to Input Three will cause the Sequential Switch to alternate between the three stages {in order) when triggered. Separate V-trigger input and output jacks are provided far each of the three stages, as well as buttons for manual switching. A small light for each stage indicates its status, on {coupled to the output} or off

994 Dual Multiples Panel

Permits multiple distribution of one signal to several different places. This process is often called signal splitting. Multiples are used for many purposes; from linking two patch cords together, sending a single signal to several different modules at the same time, to doubling or trebling the amplitude of a signal by sending it to a particular source

Technical Specifications

Power: Powered by main console

Dimensions (W x H x D) 48.5 x 15.5 x 14.0" (123.2 x 39.4 x 35.6 cm) 

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