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Notes: The Arpopone from LepLoop is a little synthesizer for generating a melody or bass line and a chord section at the same time. It is based on analog ramp dividers of which each one generates a voltage ramp starting from a master clock that can be internal or external.

Trig1 and Trig2 potentiometers set the number of clock pulses.

With the Trig Mix switch it is possible to select between a single trigger (1 or 2) or both (1+2) to advance the scales.

The Scale Step potentiometer sets the number of steps for the two scale generators.
In the mixer section, the two scales are summed together to obtain a more complex pattern. The amount of each scale can be set by two controls and can be positive (ascending scale) or negative (descending scale).

With the VCO Pitch knob, the melody can be transposed while maintaining the same interval between notes.

The note generated by the VCO is fed to a chain of dividers to obtain four sub harmonics of the original note. One of these is the bass section with its own filter and envelope, the other three form the chord section with their envelope.

The two envelope sections are identical, both have a selector for different trigger sources:

Trig1 & Trig2: The envelope starts at the flash of the green LED (bass) or yellow LED (chord)
SB1 & SB2: The envelope starts at the first step of Scale1 (bass) or Scale2 (chord)
White & Blue: The envelope follows the intensity of the white LED (bass) or the blue LED (chord). Except for this setting the envelope length is set by the two controls Bass ENV and Chord ENV. Additionally, an EXT CV input allows to provide an external envelope.
The bass channel is passed through a resonant low-pass filter with Cutoff and Resonance control.

Finally the Bass and Chord channels are mixed together. The output level is set by the Bass LEV and Chord LEV controls.

Two outputs jacks are available: the mono OUT jack on the back panel and the STEREO jack on the front panel, useful for listening with headphones and for separate channel output.

Notes: - 3 x external audio out
- 1 x audio out
- 3 x cassation bass drum
- With clock
- Internal or external
- Trigger in
- Click out

The MULTI CASSA is an electronic Eurorack module for percussion sound and special FX. Created by LEP Laboratories, the MULTI CASSA module takes inspiration from the Leploop synth. MULTI CASSA is a combination of two modules with different pitch settings, the first maintains the original pitch, the second increases the pitch to recreate the sound off high tom or snare drum.

TRIG MIX: The rhythm played by the MULTI CASSA is the sum of the two trig IN1 and IN2. The trig mix pot adjusts the mix between the two trig input, which is great for creating polyrhythms.

FREQUENCY: Adjusts the pitch of the sound, also effects the resonance.

RESONANCE: Adjust the resonance, i.e. the damping time of the case. Beyond a certain level the MULTI CASSA can go into permanent oscillation. The level at which the oscillation begins varies with frequency.

DISTORTION: Adjusts the level of signal distortion.

Notes: ***B-STOCK: Box opened, product in perfect working order***


The Arpopone from LepLoop is a little synth-voice for generating a melody or bass line and a chord section at the same time. It is based on analog ramp dividers of which each one generates a voltage ramp starting from a master clock that can be internal or external.

Trig1 and Trig2 potentiometers set the number of clock pulses.

With the Trig Mix switch it is possible to select between a single trigger (1 or 2) or both (1+2) to advance the scales.

The Scale Step potentiometer sets the number of steps for the two scale generators.
In the mixer section, the two scales are summed together to obtain a more complex pattern. The amount of each scale can be set by two controls and can be positive (ascending scale) or negative (descending scale).

With the VCO Pitch knob, the melody can be transposed while maintaining the same interval between notes.

The note generated by the VCO is fed to a chain of dividers to obtain four sub harmonics of the original note. One of these is the bass section with its own filter and envelope, the other three form the chord section with their envelope.

The two envelope sections are identical, both have a selector for different trigger sources:

Trig1 & Trig2: the envelope starts at the flash of the green LED (bass) or yellow LED (chord)
SB1 & SB2: the envelope starts at the first step of Scale1 (bass) or Scale2 (chord)
White & Blue: the envelope follows the intensity of the white LED (bass) or the blue LED (chord). Except for this setting the envelope length is set by the two controls Bass ENV and Chord ENV. Additionally, an EXT CV input allows to provide an external envelope.
The bass channel is passed through a resonant low-pass filter with Cutoff and Resonance control.

Finally the Bass and Chord channels are mixed together. The output level is set by the Bass LEV and Chord LEV controls.