MacTermen is a software monophonic tone generator for MacOSX. Frequency and timbre color are driven by mouse position over the application main window, or by a MIDI controller connected to your Mac's USB input. Mouse vertical position controls pitch (4 octaves). Mouse horizontal position controls tone color (sinusoidal > sawtooth).

Keyboard control over formant tuning (intervals), stereo placement of sound, vibrato on/off, vibrato speed, sample & hold, pulse effect, ring modulation.
Preferences controls: slider 1 controls s&h and pulse tempo in beats per minute. Slider 2 selects base pitch (MacTermen covers the entire audio spectrum). Skin selection.