NFJones / njones-audio

A C++ audio to MIDI note conversion library

a2m

a2m is a C++ library that is able to convert raw sound samples into MIDI notes. It is intended for use in VSTs and other plugin frameworks. The fftw library was used for the FFT calculation and must be linked.

Example

#include <a2m/converter.h>

void my_converter(double *samples, size_t nsamples, int samplerate, int block_size) {
    auto converter = a2m::Converter(samplerate, block_size);

    for (size_t i = 0; i < nsamples / block_size; ++i) {
        auto notes = converter.convert(samples + (i * block_size));

        for (auto &note : notes) {
            std::cout << "Pitch =" << note.pitch << endl;        // 0 - 127
            std::cout << "Velocity = " << note.velocity << endl; // 1 - 127
        }
    }
}