Behringer ABACUS Analog Music Computer for Eurorack

Buchla's legendary 257 and 281 analog synthesizers are considered classics of their genre, implemented in a wide range of musical applications. The Behringer ABACUS is modeled after these original instruments, featuring an array of linear, logarithmic and exponential triggered or continuous functions.

Modulate and Push the Tempo
The ABACUS can generate musical envelopes or LFO signals up to 25 minutes in length and as fast as 1 kHz. Designed for use with other modules, it also allows you to change the modulation depth, modulate backwards and create even more musical events by manipulating tempo.

Unlimited Creativity
By manipulating the ABACUS’ control knobs, incoming signals can be an amplified, attenuated, integrated or inverted for unlimited creativity. Totally unique and crazy warped effects like lag, slew or portamento can be applied to control voltages perfect for use with a sequencer, or synth keyboard. Up to 4 control voltages can be combined to generate even more complex modulations.

Product Features

Algebraic sound processor modeled after Buchla's* models 257 and 281 from the '60s
Perform wide range of linear, logarithmic and exponential triggered or continuous functions
Generate musical envelopes or LFO signals up to 25 minutes and as fast as 1 kHz
Change the depth of modulation or even modulate backwards
Create musical events such as ramping up or down in tempo
Amplify, attenuate, integrate or invert incoming signals for unlimited creativity
Apply lag, slew or portamento to control voltages for unique warped effects
Initiate musical events upon sensing motion in the system
Create note division and flam for amazing effects
Generate complex modulations by combining up to 4 CVs
LEDs indicate activity on all outputs for visual monitoring
Eurorack specs: 20 HP, 60 mA +12 V, 50 mA -12 V

• Modeled after Buchla's classic 257 and 281 models
• Generates envelopes or LFOs up to 25 minutes long
• Modulate depth and tempo for creative flexibility
• Combine up to 4 CVs for complex modulations
• Apply lag, slew, or portamento for unique effects
• LEDs provide visual monitoring of all outputs
• 20 HP Eurorack format, suitable for modular setups