BaconPaul, maintainer and developer on the Surge project, has introduced a free and open source software synthesizer instrument based on audio rate modulation.
Exploring audio rate inter-modulation of signals, the 6-operator Six Sines synth comes with ample modulation options.
Each of the 6 operators can output to audio or can modulate themselves (feedback) or subsequent operators. So operator 3 can feedback its own signal or modulate operators 4, 5, and 6. Modulation of subsequent operators can be phase modulation (the ‘phi’ symbol) or digital ring/audio-rate-amplitude modulation (the ‘A’ symbol).
But the real trick of sound design with the thing is the modulation architecture. Each knob on the screen represents a node with an independent envelope and LFO per voice. So each operator, operator modulation application, operator feedback, and operator level can be indpendently and individually modulated.
Six Sines is available as standalone software for Windows, Mac and Linux, and in VST3, AU and CLAP plugin formats.
More information: BaconPaul
this is a fantastic new synth, i can’t believe it’s free, cheers BaconPaul, you’re a legend