Saïch by Instruo is a quad analogue oscillator perfect for polyphonic sounds, Chords and fat unison sounds. The oscillator has one primary and three secondary 1V/octave inputs for accurate control of the pitch of each tone generator. For tone generators 2, 3, and 4, there are detune controls for shifting the frequencies up and down. Each of the four oscillators generates a sawtooth waveform, oscillator 1 can optionally generate inverted sawtooth and square along with PWM. The crossfader is capable of various tasks: manually and also via CV input it can fade/scan between the levels of the oscillators, crossfade interval distances up to unison sound and adjust and crossfade the pitch distances within the diatonic modes. The module is sonically very productive and above all more versatile than one might assume due to the clear number of controls. Whoever wants to implement polyphonic sounds in the modular system, but shies away from the effort of four individual oscillators is well positioned with this very good sounding quad tone generator. Thanks to the FM input with switchable linear respectively exponential characteristics, even metallic, and not to say weird sounds can be easily implemented with Saïch. A perfect companion for Saïch is the quadruple quantizer Harmonàig, with which unbelievable musical results can be created in interaction.