BltWorks has launched version 1.0 of FilterOrgan, an audio effect plugin that features polyphonic tuned filters that can be controlled by MIDI.
With FilterOrgan you can add bandpass filters to your audio track whose center frequencies are tuned to musical notes.
You can control the filters real-time by MIDI to make them play harmonies and melodies.
FilterOrgan is available for Windows and Mac (VST/AU), priced at $39 USD.
More information: BltWorks