Sine – A smooth curved shape that begins positive and then curves negative and back again. Useful for sweeps and vibrato.

Triangle – Is a positive/negative shape like the Sine, but without curvature. Useful for sweeps and vibrato.

Square – Starts at maximum positive value and then drops to maximum negative value.  Useful for trills and pulsing effects.

Rounded Square – A smoothed Square wave.  Useful for smooth pulsing.

Ramp – A linear slope from highest to lowest value.  This waveform is also frequently referred to as a sawtooth wave.  Useful for sweeps.

Reverse Ramp – A linear slope from lowest to highest value. This waveform is also frequently referred to as an inverted sawtooth wave.  Useful for reverse sweeps

Sample and Hold – Steps through random values.  Useful for classic analog synth effects.

Heartbeat – Modeled after a human heartbeat

Noise/Random - Similar to Sample and Hold, with random values, but doesn’t step, the values change immediately.  Useful for adding chaos.