Low Frequency Oscillators (LFOs)

A number of dedicated low frequency oscillators exist to modulate things like amplitude, cut-off frequency and pitch.

The pitch LFOs can be quantized to the nearest note in a chord, octave, or scale.

A reduced set of basic of waveforms are available as LFO sources; noise, sine, triangle, saw or square wave.

All LFO rates are related to song BPM and are expressed as fractions or multiples.

A hold time (in milliseconds) may be specified to sample & hold the LFO for the specified duration. Optionally (by specifying a "negative" value), the LFO value may be the result of linear interpolation between two hold samples (current and next). This allows for smooth variation between two hold values, rather than yielding a jarring "staircase" effect. This is particularly useful for interpolating between random (noise) LFO values, allowing for randomly changing/evolving timbres in sound design.