A universal LFO that can also sample an external source. There are 6 LFO types: SINE, TRIANGLE, EXT, RAMP, SAWTOOTH AND PULSE. If nothing is connected to the RND / EXT jack, then random white noise will be sampled when EXT is selected. You can get interesting results when you connect something such as another LFO to the RND / EXT jack. The SEL jack can be used to select the LFO type by supplying a control voltage. The LOW setting goes all the way down to 0.01 Hz, and up to 10 Hz. The HIGH setting goes from 5 Hz to 400 Hz. There are 3 choices for the output polarity. The LFO cycle can also be externally reset.