DOEPFER A-155 - Analog Sequencer

Features of the Doepfer A-155 analog rows (knobs): 8 potentiometers (knobs) lower row: Scale (knob), voltage output range 0 … ~ +6,5V upper row: 1V/2V/4V (octave range switch for exact VCO control), voltage output ranges 0 …1.0V / 0 …2.0V / 0 …4.0V Glide time (knob), same as portamento or slew limiter Glide Control (control input for switching glide on/off) S&H Control (control input for internal S&H, works like A-148) Pre Glide/S&H-Out (analog output before S&H and glide unit, especially required when external audio signals are used as inputs of the lower row) Post Glide/S&H-Out (analog output after S&H and glide unit) lower row: external inputs for the 8 steps (switched jack sockets), control signals or audio signals may be used as inputs (allowed voltage range -5V…+12V), the knobs of the lower row are working in this case as attenuators Features of the trigger rows (switches): 4 Trigger/Gate tracks with 2 rows of switches toggle switches of 1-0-1 type (with middle position), which can be used to send a trigger/gate to the track above or below or to send no trigger/gate (middle position) 3 trigger rows (i.e. short pulse for each step set, pulse width corresponds to the pulse width of the clock/step input signal) 1 gate row (i.e. a high signal is applied during the length of the step set) Control inputs and buttons: Step (defines the tempo of the sequence, same as clock or trigger input) Reset (resets all rows to step 1) Start (starts the sequence at the momentary position) Stop (stops the sequence at the momentary position)