Odsay is a two-oscillator analog synthesizer free VST instrument, and was the one of the first synthesizers with duophonic capabilities (the ability to play two notes at the same time).
* Switchable between sawtooth, square, and pulse waveforms with oscillator sync, a ring modulator, and pink or white noise.
* Pulse-width can be modulated manually or with the LFO or the ADSR envelope generator.
There is a (static) high-pass filter, as well as a voltage controlled low-pass self-oscillating filter.
* The filter can be controlled by either of the two envelope generators, an ADSR (attack, decay, sustain, release) and a simple AR (attack, release) and modulated by the LFO, sample-and-hold, the keyboard, or a separate CV (pedal) input on the back panel.
* The Sample/Hold input mixer can be used to route the output of the VCOs to the FM input of VCO 2 and the VCF, enabling audio frequency FM.