Tau Pro is a acid bassline synthesizer.
Features:

    * Two 64-bit alias-free oscillators, with a choice of eleven waveforms each, plus detune and PWM (available for all waveforms)
    * Hard Sync and Ring Modulation for extra grit
    * Switchable 18db/24db/36db per octave resonant lowpass filter with EG modulation. Classic acid bassline sound!
    * Velocity-controlled Accent Feature and supersmooth Glide mode
    * Built-in Stereo FX unit with distortion, delay, chorus and flange
    * Full MIDI control