PHASEX is an experimental JACK audio / ALSA MIDI softsynth for Linux with a synth engine built around flexible phase modulation and flexible oscillator/LFO sourcing.

Modulations include AM, FM, offset PM, and wave select. PHASEX comes equipped with a 12db/octave filter with two distortion curves, a stereo crossover delay and chorus with phaser, ADSR envelopes for amplifier and filter, realtime audio input processing capabilities, velocity/aftertouch sensitivity, and more.