Wolpertinger

Wolpertinger is a subtractive, antialiased polyphonic software synthesizer. Sound is
generated by a Saw/Rect/Triangle wave generator and filtered through
a resonant bandpass filter whose center frequency "bounces" around the frequency of
the playing notes. Thanks to the Juce library it can be used both as a
standalone application supporting JACK or ALSA audio outputs, and as a VST
instrument for (Linux) VST hosts.