Doepfer - A-155: Analog Voltage/Trigger Sequencer

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Manufacturer Description:

analog and trigger sequencer, 2 rows of 8 steps with knobs and 2 rows of 8 steps switches



features of the analog rows (knobs):

* 8 potentiometers (knobs)

* lower row: scale (knob), upper row: 1v/2v/4v (octave range switch for exact vco control)

* 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, 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)



step and reset are compatible to the midi interface a-190, i.e. in
combination with the a-190 the a-155 may be synchronized via midi. the
quantizing module a-156 can be used to quantize the infinite analog
voltages coming from a-155 into discrete semitone steps (multiples of
1/12v). without midi interface e.g. a lfo rectangle output can be used
to define the tempo of the sequence.



the sequencer controller a-154 adds a lot of new functions to the a-155
(e.g. voltage controlled addressing, forward/backward/pendulum/random
mode, voltage control of first and last step, voltage controlled clock
and gate length, step skipping, combination of several a-155 in
parallel/serial mode and many more).



this module has a maximum current draw of 100ma. it requires 50 te/hp worth of space to fit in a eurorack frame.

Product Specs

Condition
Brand New (New)
Brand New items are sold by an authorized dealer or original builder and include all original packaging.learn more
Brand Doepfer
Model A-155 Analog Voltage/Trigger Sequencer
Categories Eurorack
Made In Germany

Sounds and looks great. Really happy with my purchase.

Eliazar C. - April 04, 2020

John Z. - April 04, 2020

John Z. - April 04, 2020

Great service and communication. Shipped quickly. Thank you.

Aaron E. - April 04, 2020

Great communication, fast shipping and all around excellent service. I would definitely recommend.. Thanks!

Richard R. - April 04, 2020

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Pomona, CA, United States
Joined: Apr 2016

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