This module is a specialized LFO. It outputs four trapezoidal waveforms which are synchronized with each other. Each of the four knobs adjusts the duration of a different phase of each output.

http://www.bartonmusicalcircuits.com/qtlfo/

• ? mA +12V
• ? mA -12V
• ? mA 5V

Module is available as a DIY project only.

No info about availability.