ZynAddSubFX/LFO

An LFO is used to modulate parameters such as amplitudes, frequencies or filters.

Controls
The main LFO controls are:
 * FREQ: frequency = LFO speed
 * DEPTH: LFO amplitude
 * START: start phase = position the LFO starts at
 * DELAY: delay between the note start and the LFO start
 * shape: envelope shape can be sine, triangle, square, ramp up, ramp down, exp1 down, exp2 down

Other controls:
 * STR: stretch = controls how much the LFO frequency changes according to the note's frequency
 * when negative, the LFO frequency is decreased on higher notes
 * when zero, the LFO frequency is the same on all notes
 * when positive, the LFO frequency is increased on higher notes
 * A.R.: amplitude randomness
 * F.R.: frequency randomness
 * SYNC: continuous mode = when on the LFO won't be reset on each new note but will synchronize