Doepfer A-157 Eurorack Trigger Sequencer Subsystem

Three modules in one sequencing subsystem

These days, the A-157 Trigger Sequencer comes as a complete sequencing subsystem, packing three premium Doepfer modules into one package. The inclusion of these breakout boxes is a huge bonus since they effectively turn the main A-157-1 module into a trimmed-down version of the highly popular (and no longer available) Schaltwerk sequencer. All you need is 52HP of space in your rack, and you're ready to add some seriously powerful sequencing to your setup.

Fast, powerful, and easy to use sequencing

The A-157-1 Trigger Sequencer is amazingly straightforward and totally intuitive, thanks to its dedicated step buttons and LED feedback. That means you can create a full eight 16-step sequences in a matter of seconds. It's just what you need if you want to build patterns on the fly for live performance. The included A-157-2 and A-157-3 breakout panels make connecting the rest of your system a piece of cake too. There are individual 3.5mm outputs for each channel, complete with LEDs that reflect sequenced notes, plus a full set of control inputs with start, stop, reset, clock, and more.

Layers of control possibilities onboard

Note: the v1 firmware doesn't yet incorporate all the features listed on the chassis.

The flexibility of the A-157 Trigger Sequencer Subsystem is still remarkable enough that the synth nuts here at Sweetwater are impressed, and there's a ton you can do beyond the basic capabilities of an 8 x 16 sequencer. For starters, you can chain patterns to get 32- or even 64-step sequences. Then there's the ability to edit sequences as they run, while batch functions such as shift left and right and invert selected rows let you make huge changes quickly. The A-157 Trigger Sequencer Subsystem's additional play modes include forward, backward, pendulum, and random, for all kinds of fun variations.

Doepfer A-157 Trigger Sequencer Subsystem Features:

• Insanely flexible 8 x 16 matrix step sequencer in a 52HP of Eurorack space (min depth 45mm)
• Provides 8 channels with 16 visible steps each for playing trigger/gate signals
• Extend sequences to 32 or 64 steps with easily layered controls
• Swap active and inactive steps, invert steps in selected rows, shift patterns, and more
• Multiple playback modes include forward, backward, pendulum, and random
• Breakout modules provide individual trigger outs and tons of sequence control
• Recall and store your favorite sequences