Low-Frequency Oscillator with 18 waveform shapes and modulation features. More...

#include <gin_lfo.h>

Classes
struct	Parameters

Public Types
enum class	WaveShape : int { none , sine , triangle , sawUp , sawDown , square , squarePos , sampleAndHold , noise , stepUp3 , stepUp4 , stepup8 , stepDown3 , stepDown4 , stepDown8 , pyramid3 , pyramid5 , pyramid9 }

Public Member Functions
	LFO ()

void	setSampleRate (double sr)

void	setParameters (Parameters p)

void	reset ()

void	noteOn (float phase_=-1.0f)

float	process (int numSamples)

float	getOutput ()

float	getOutputUnclamped ()

float	getCurrentPhase ()

Static Public Attributes
static constexpr int	maxRandomPhase = 1000

Detailed Description

Low-Frequency Oscillator with 18 waveform shapes and modulation features.

LFO provides a versatile modulation source with many waveforms, phase control, fade-in, delay, and depth/offset parameters. It supports both smooth waveforms (sine, triangle) and stepped waveforms (sample-and-hold, pyramids, steps).

Key Features:

18 waveform shapes including classic and exotic types
Phase offset control
Delay before LFO starts
Fade-in over time
Depth and offset controls
Note-on retriggering with optional phase
Sample-and-hold with interpolated noise

Waveform Types:

Classic: sine, triangle, sawUp, sawDown, square
Random: sampleAndHold (stepped), noise (interpolated)
Stepped: stepUp/Down (3/4/8 steps)
Pyramids: pyramid3/5/9 (symmetrical steps)
Positive: squarePos (0 to 1 instead of -1 to 1)

Parameters:

waveShape: Which waveform to use
frequency: LFO rate in Hz
phase: Phase offset (0 to 1)
depth: Output scaling
offset: DC offset added to output
delay: Time before LFO starts (seconds)
fade: Fade-in time (seconds)

Usage:

LFO lfo;
lfo.setSampleRate(44100.0);
 
LFO::Parameters params;
params.waveShape = LFO::WaveShape::sine;
params.frequency = 2.0f;  // 2 Hz
params.phase = 0.0f;
params.depth = 1.0f;
params.offset = 0.0f;
params.delay = 0.0f;
params.fade = 0.1f;  // 100ms fade-in
 
lfo.setParameters(params);
lfo.noteOn();
 
float modValue = lfo.process(blockSize);
float output = lfo.getOutput(); // Clamped to -1..1