We released our plug-in which sends MIDI notes by audio peaks under GNU/GPLv3. It has one audio input port and one MIDI output port. It works like trigger-sampler, but more unix-way (without sampler). You just send output MIDI note to sampler that you love. You can save dynamic of your audio signal, just use velocity controls. About "Note-off mode" control you can read here: https://github.com/metachronica/audio-dsp-midi-trigger/blob/6992e837f8cdce1… We'll document it in the future more user-friendly. https://github.com/metachronica/audio-dsp-midi-trigger First release here: https://github.com/metachronica/audio-dsp-midi-trigger/releases/tag/v0.0.1