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The Buchla 100 series' eight-step sequencer (1960s), two panel units wide, drawn in its San Francisco Tape Music Center panel: its switching "is accomplished by applying a pulse, usually from Model 140 pulse generator. Indicator lamps show which of the 24 potentiometers are in control" (the 100 series catalogue). Three rows of eight knobs for the voltages A, B and C, a lamp over each step, eight pulse outputs, a NUMBER OF INCREMENTS switch from 2 to 8 and the INPUT for the stepping pulse.

Key features

• Two to eight steps
• Three voltages per step (A, B, C)
• A pulse output and a lamp for each step
• Stepped by a pulse at its input