ArpoVoce

60hp synth voice module

    4 voltage controlled Hz\Volt oscillators (VCO)
VCO1 sine wave with sync and FM
VCO2 sine wave with FM
VCO3 sine wave with sync and FM
VCO4 sine-square-sawtooth with LFO option
    VCO CV IN are connected om cascade
White Noise generator with cutoff

4 cascadable voltage controlled amplifiers (VCA) controlled by envelope or ring modulated by VCO4
3 Attack-Release envelope generators (ENV) with 3 modes of operation (GATE, REPEAT, TRIG) long\short mode and linear\exponential switch with CV out.
VCO1 and VCO3 are hard syncable via the SYNC switch.
VCO2 will do the pitch and VCO1 the harmonic contents, more or less like a resonant filter. (VCO1 pitch = cutoff) The same is possible with VCO3 (cutoff) and VCO4 (pitch) featuring a full two voices synth.
A two formant voicing is possible by syncing both VCO1 and VCO3 with the same VCO2 making possible, among others, human voice imitation.
The FM MOD control can produce FM synthesis as well as vibrato or envelope modulation.
Each VCA is connected to its own VCO and can be controlled by an envelope or by VCO4 becoming a ring modulator.
VCA2 and VCA4 can be routed to another VCA output, obtaining a velocity control with ext cv in, or a double modulation, up to three VCA’s can be chained.
A white noise can be used for VCA2 input, this can give a further piattino (high hat) sound.
VCA1 have an external audio input.
Six channels Audio Mixer with individual out for cassa, snare, stereo out with vca1\2 left and vca3\4 right, mono out.
Many routing capabilities, 5 or more sound at the same time, 3 voice polyphonic option, spaghetti free.
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https://www.leploop.org/2024/04/20/the-arpovoce-module-prototype/