RS-370 Polyphonic Harmonic Generator

Imagine sculpting sounds from pure harmonics, where each of the 32 partials per oscillator can be dialed in with precise level and phase control—this module makes additive synthesis feel intuitive and alive.

At its core, it packs 24 oscillators across 6 polyphonic voices, blending digital additive synthesis with wavetable capabilities from 16 wave banks, plus classic waveforms like sine, triangle, saw, and square. Switch between polyphonic MIDI mode for 6-voice playback with simultaneous MIDI-to-CV conversion, polyphonic analog for direct CV/gate inputs, or real-time monophonic mode to morph harmonics on the fly via the display and single main knob. A 10-segment envelope, LFO, and mod matrix with 30 analog destinations (expandable via RS375 for CV harmonic control) handle dynamics, while MIDI in/thru supports 1V/oct or Hz/V tracking. Housed in a compact 36HP Eurorack panel, its screen shows harmonic spectra and waveforms as you edit.

Players love its versatility as both a polyphonic beast and utility MIDI/CV hub in hybrid rigs, though some note the single knob keeps deeper programming menu-driven rather than hands-on.