Sine Wave Oscillator
Overview
The sine wave oscillator is one of the most fundamental building blocks in synthesis. It generates a basic, pure waveform consisting of a single frequency with no harmonics or overtones. The sine wave oscillator is often used in additive synthesis to create complex waveforms by combining simple sine waves of various frequencies, phases, and amplitudes. It is also often used as a low-frequency oscillator for modulating various audio parameters, such as frequency and amplitude.
sin_osc efficiently synthesizes sine waves from a lookup table to avoid performing complex calculations in real-time. The lookup table is optimized for use in small MCUs (microconrrollers), by having the data stored as c++ constexpr array, which is effectively placed in flash memory.
Declaration
struct sin_osc
{
constexpr float operator()(phase p) const;
constexpr float operator()(phase_iterator i) const;
};
constexpr auto sin = sin_osc{};Expressions
sin_osc is a model of BasicOscillator and implements all valid expressions of BasicOscillator. sin_osc is stateless. The global instance sin can be used anywhere without needing to be placed in a class or struct. It is semantically equivalent to a global function.