4MS Quad Pingable LFO

4MS Quad Pingable LFO

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The Quad Pingable LFO is a compact, playable four-channel tap-tempo, clock-syncable LFO with variable skew and reset.

The QPLFO is designed to be useful in small portable systems that require maximum functionality in minimal space, as well as large systems that need maximum modulation sources.

Basic features

Quad "pingable" LFO's -- frequency is set by time between pulses ("ping")
Each of the 4 channels is an independent LFO
Can produce a variety of waveshapes: "Pluck," to ramp-down, to triangle, to ramp-up, and all shapes in between
Channels can easily modulate, trigger, and reset each other for complex and slowly morphing outputs
Slowest period is about 71 minutes (0.0002 Hz), fastest speed is about 500Hz (marginal tracking up to 1kHz)
Tap tempo button is free-running (LFO runs indefinitely), but external clock/Ping is auto-stopping (LFO stops when external clock stops)

Connects to other modules using ribbon cables:
Outputs can connect to the 4ms VCA Matrix, or the 4ms SISM, or the Toppobrillo Mixiplexer
Normalization of ping jacks can connect to the 4ms Quad Clock Distributer


  • 154 mA +12V
  • 73 mA -12V
  • 0 mA 5V
  • 40 mm deep
  • 12hp