LEPLOOP was designed to be a minimalist electronic music live-performance groove-box, which can be used to create a variety of electronic musical styles. Small in nature but aggressive in sound, the user will be able to create a variety of analog timbres and beats.

The LEPLOOP can be synched via MIDI to another LEPLOOP for tempo-synched operation or to another MIDI device or sequencer to receive sequence stop & start instructions.

Leploop Tecnical info

  • 1 oscillator (VCO1) triangular/square wave
  • 1 oscillator (VCO2) sawtooth wave with ring modulator and FM modulation
  • White noise generator
  • 24 dB/OCT Low pass filter
  • Kick drum with distorsion and trigger mixer
  • 2 VCA’s
  • 2 AR Envelope generators
  • 1 LFO
  • 16 Capacitors analo sequencer PWM programmable
  • 4 Track digital rhythm sequencer 64 step each track
  • 4 Channel audio mixer
  • Midi input(clock and notes)
  • 5 CV out: SH, SEQ, LFO, ENV1, ENV2
  • 3 gate out: SH, SEQ, CASSA
  • 3 CV in: VCO1, VCO2, VCF cutoff
  • 1 audio in (VCF)
  • 4 audio out: MIXER, CASSA, VCO2, VCO mix
  • 1 clock output: clock 24, MIDI startstop
  • EEPROM memory 16 banks 10 pattern each


The 4 audio signals CASSA, VCA2, VCA2, VCF are mixed and sent to MIX output. The Bass Drum (CASSA) has it’s own dedicated output,
when connected the CASSA volume knobs remain active for the MIX output.

Rhythm Sequence

There are four rhythm instruments and one capacitor analog sequencer.
4 small red LEDs for track playing or analog sequencer mode.
16 Led’s bar shows rhythm sequencer and other informations.
The maximum length for the analog sequencer is 16 notes.

This is a true analog sequencer becausennotes are stored into 16 capacitors switchednby analog multiplexer.

The Analog Sequencer

This is a true analog sequencer becausennotes are stored into 16 capacitors switchednby analog multiplexer.

As the capacitors are subject to discharge, the note pitches will slowly decrease. It’s not possible to store the note value in memory.

Thusly, the LEPLOOP has a 16-step analog recorder, much like an analog delay.

Over time, as the analog sequencer cycles through its pattern, the signal will degrade and the sound will change. This is because the capacitor can only store the signal for a limited amount of time.
The analog sequencer is digitally controlled tempo-wise, and will work in conjunction with the digital track sequencer.

Midi Implementation

When you turn on the LEPLOOP, default is midi channel 16 for percussive instruments and channel 1 for midi notes, LEPLOOP use two midi channels: the first accepts notes for percussive instruments (4 coloured LEDs), the second is used to play PWM notes.

Leploop reviews

An unexpected review written by Chris Carter, ( Throbbing Gristle, Chris & Cosey ), he performed, recorded and upload on soundcloud short sound example.

I’ve used a lot of synths over the years but this one is something different… it’s a strange instrument. It’s small, much smaller than it appears in photos: it is part synth, part drum machine, part multi-track sequencer. I’m still figuring it all out but initial impressions are that it’s very unpredictable and slightly unstable… but in a good way.

Chris Carter – CCCL

This by Benjamin Weiss, author for instrument and music Blog

Some small-scale manufacturers of analogue hardware intitally go for a public-beta-test and leave the manuals out of the box when they send their devices to the distributers in order to see what they make of it. In this case, the distributor found the box quite promising, but decided to leave the acid test to me: “Give it a go and then tell us how it works.

Benjamin WeissDE:BUG

LepLoop in action


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