LFOs
Motion on a loop
The two LFOs of a layer: 46 shapes, rates in Hz or locked to the tempo, rate control, phase, per voice or global, and what they drive.
An LFO is a slow oscillator that moves something else: the pitch, the level, a filter, the pan. Each VAST layer has two, LFO1 and LFO2, and they do nothing until a field reads them.
Seven lessons, from the shapes to the delayed vibrato: how fast an LFO runs and what can change its speed, where each note's cycle starts, which LFOs belong to a voice and which to the whole program, and the classic uses.
From the shapes to the delayed vibrato.
Each lesson animates LFOs taken from the factory programs: watch them on the scope, slow them down, move their controls and hear them.
An LFO repeats one shape over and over.
4059 LFOs in the factory programs, 1664 of them SinesLESSON 2RateRateHow many cycles a second: from 0 to 24 Hz, or a note value locked to the tempo.
LFO1's median rate 3.2 Hz; 123 LFOs on the tempoLESSON 3Rate controlRateRateCt lets any control source move the rate: at its minimum the LFO runs at MnRate, at its maximum at MxRate.
2772 LFOs with a rate controlLESSON 4PhaseStartWhere the cycle starts when a note begins.
333 LFOs start at 90°, 180° or 270°LESSON 5Local and globalScopeLFO1 belongs to each voice: every note starts its own, so the notes of a chord wobble each on its own.
627 programs with a global LFO2LESSON 6Vibrato, tremolo, wahDestinationAn LFO does nothing until a field reads it.
2409 LFOs on PITCH, 382 on AMPLESSON 7Delayed vibratoWith an ASRThe vibrato a player adds after the note has settled: an ASR waits, then rises, and scales the LFO.
142 layers with a delayed vibrato