"The K102E is a digital compound oscillator rooted in our original “Island Synthesis” philosophy.
2 independent digital cores are blended via Phase-Modulation, Cross-Fade, or Additive Mix to create dense, animated harmonics—all in a compact Eurorack module.
The K102E is a digital compound oscillator module developed based on the unique "Island Synthesis" philosophy.
Features
3 independent oscillators for rich sound generation
Stable oscillation and diverse wavetable synthesis achieved through DSP processing by microcomputer
Two main oscillators (A/B) function similar to typical complex oscillators
Selection from 3 synthesis methods (phase modulation, multiplication, crossfade)
Hard sync and detune functions
8 types of waveforms following 80's wavetable synthesizers
Reading position controlled by harmonic specification index
Third oscillator (C) functions as an auxiliary oscillator
Selection of any frequency from low to high
Can be used as an LFO or cross-modulator
External control interfaces include standard CV inputs with octave/volt control, CV control for harmonics (wavetable read position), and CV input for alpha parameter of waveform synthesis
"Kepra is a rhythm instrument developed through detailed analysis of an original Japanese vintage programmable rhythm machine.
Rather than relying on sampled sounds, Kepra recreates each instrument by studying the original analog circuits, measuring waveforms, analyzing spectral content, and reproducing their behavior in software.
Developing Kepra felt less like sampling a drum machine and more like studying an archaeological artifact.
Every instrument was investigated through circuit analysis, waveform measurements, timing analysis, and spectral comparison to better understand how the original hardware produced its sound.
Rather than reproducing recordings, Kepra attempts to reconstruct the behavior behind them.
The Missing Instrument
One voice in Kepra did not exist on the original hardware.
The Shaker was designed as an 'imaginary expansion'—a voice inspired by the architecture and character of the original instrument.
Instead of adding a modern sample-based shaker, it was developed by asking a simple question:
'If the original designers had decided to include a shaker, how might they have built it using the same technology?'
The result is not a historical reproduction, but a speculative reconstruction that aims to remain faithful to the design philosophy of the original machine.
Not an Emulator
Kepra is not intended to be a museum piece.
It is a modern rhythm instrument built from careful hardware analysis, extending the ideas of a classic Japanese drum machine into new creative territory."
