pulp::signal::drum::FmWaveTable Struct Reference

A compact, license-clean bank of 26 phase-readable FM waves. More...

#include <fm_tables.hpp>

Static Public Member Functions
static double	read (int wave, double phase, double phase_increment=0.0)
static double	warp (double phase, double amount)
	Casio-family phase warp: amount zero is identity; one moves the bend point close to the start of the cycle and produces a saw-like spectrum.

Static Public Attributes
static constexpr int	wave_count = 26
static constexpr int	harmonic_count = 4
static constexpr std::array< std::array< double, harmonic_count >, wave_count >	harmonics

Detailed Description

A compact, license-clean bank of 26 phase-readable FM waves.

Each row is an authored four-harmonic spectrum. Reading the table at a phase offset makes it suitable for phase modulation; normalizing by the coefficient L1 norm keeps every row bounded without a runtime limiter.

Member Function Documentation

read()

double pulp::signal::drum::FmWaveTable::read ( int wave, double phase, double phase_increment = 0.0 )

inlinestatic

warp()

double pulp::signal::drum::FmWaveTable::warp ( double phase, double amount )

inlinestatic

Casio-family phase warp: amount zero is identity; one moves the bend point close to the start of the cycle and produces a saw-like spectrum.

Member Data Documentation

harmonic_count

int pulp::signal::drum::FmWaveTable::harmonic_count = 4

staticconstexpr

harmonics

std::array<std::array<double, harmonic_count>, wave_count> pulp::signal::drum::FmWaveTable::harmonics

staticconstexpr

Initial value:

{{
            {{1.00, 0.00, 0.000, 0.00}},
            {{1.00, 0.50, 0.333, 0.25}},
            {{1.00, -0.50, 0.333, -0.25}},
            {{1.00, 0.00, 0.333, 0.00}},
            {{1.00, 0.00, -0.111, 0.00}},
            {{1.00, 0.70, 0.000, 0.00}},
            {{1.00, -0.70, 0.000, 0.00}},
            {{1.00, 0.00, 0.700, 0.00}},
            {{1.00, 0.00, -0.700, 0.00}},
            {{1.00, 0.00, 0.000, 0.70}},
            {{1.00, 0.00, 0.000, -0.70}},
            {{0.50, 1.00, 0.000, 0.00}},
            {{0.50, 0.00, 1.000, 0.00}},
            {{0.50, 0.00, 0.000, 1.00}},
            {{1.00, 0.50, -0.333, 0.25}},
            {{1.00, -0.50, -0.333, -0.25}},
            {{1.00, 0.25, 0.750, 0.125}},
            {{1.00, -0.25, 0.750, -0.125}},
            {{0.75, 1.00, 0.500, 0.25}},
            {{0.75, -1.00, 0.500, -0.25}},
            {{1.00, 1.00, 1.000, 1.00}},
            {{1.00, -1.00, 1.000, -1.00}},
            {{1.00, 0.80, 0.400, 0.10}},
            {{1.00, 0.10, 0.400, 0.80}},
            {{0.25, 0.50, 0.750, 1.00}},
            {{1.00, -0.25, -0.500, 0.75}},
        }}

wave_count

int pulp::signal::drum::FmWaveTable::wave_count = 26

staticconstexpr

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The documentation for this struct was generated from the following file:

• /home/runner/work/pulp/pulp/core/signal/include/pulp/signal/drum/fm_tables.hpp