Key Features
- Comprehensive sequencer module
- Four switchable trigger outputs
- Two layers of knobs to control analog outputs
- Glide controls, CV inputs and more
Doepfer A-155 Analog/Trigger Sequencer Overview
The Doepfer A-155 is an analog and trigger sequencer module made for Eurorack systems. It enables you to create eight-step patterns, so you can make your modular setup a little more musical.
Send a clock signal into the clock input to get it going. It will then move through the eight steps of the sequence one by one at the speed of your chosen clock. For triggers, there are four outputs that can be switched between, or off completely, allowing you to send different patterns to different destinations.
There are two layers of knobs to determine the analog out, and therefore, two analog outputs. These would most commonly be used to determine pitch, but can also be used for other tasks, such as controlling filter cut-off. Then with options for glide, CV controls, and more - you'll have plenty of room to make exciting patterns with your modular.
Product Ref: 220574
Full Description
View Full DescriptionGetting the sequence going
To get the A-155 running, you should send a clock signal to the clock input. A good module to use for this is an LFO set to a pulse wave setting. When you increase the frequency of the LFO, the sequence will get faster and vice versa.
The clock can be controlled manually with an adjacent button, as with the three other control inputs. These include a stop (which stops the sequence advancing), start (which starts it again), and reset (which sends it back to step one).
Triggers control
The trigger outputs send a short pulse - ideal for controlling envelopes, sample/hold units and more. They are set using two rows of eight switches.
In the neutral position they don't send any output, but set to either up or down will send to the corresponding trigger output shown by the lines on the unit. There is also the gate output, which instead of a short pulse, sends a high signal.
Pitch control
Two rows of eight knobs determine the A-155's voltage output. The upper row's range is set via a three-way switch to either 1V, 2V or 4V - ideal for precise applications like pitch control. The lower row's range can be set wider, using its scale knob, but as a result, is not as precise.
Each row has a glide control, determining how much the A-155 slides between voltage values. The output can then be set to either pre or post-glide, depending on whether you want to use it. There's also a sample and hold output available, as well as audio/CV inputs for each voltage step and a CV control input for glide values.
Features
- Eight-step trigger and analog sequencing
- Two sets of eight knobs for setting voltage output levels
- Four trigger and gate tracks set with two rows of switches
- Trigger signals send a short pulse, the gate output sends a high signal
- Glide time can be set on analog outs for sliding between voltage values
- Sample and hold control for using sustained analog outputs
- Pre and post glide outputs are available to use
- Control speed of sequence via the clock input
- Other controls include start, stop and reset
Specifications
- Width: 50HP / 253.7mm
- Depth: 40mm (measured from the rear side of the front panel)
- Current: +80mA (+12V) / -20mA (-12V)
- Product Code: A-155
| Reviews of our service
View all
