frequencyToMidiNote() [2/2]

u8 fl::audio::detector::Note::frequencyToMidiNote ( float hz ) const

private

Definition at line 158 of file note.cpp.hpp.

                                                        {
    if (hz <= 0.0f) {
        return NO_NOTE;
    }
 
    // MIDI note = 69 + 12 × log₂(f / 440)
    float semitones = 12.0f * (fl::logf(hz / A4_FREQUENCY) / fl::logf(2.0f));
    int midiNote = static_cast<int>(A4_MIDI_NOTE + semitones + 0.5f);  // Round to nearest
 
    // Clamp to valid MIDI range (0-127)
    if (midiNote < 0) {
        return 0;
    }
    if (midiNote > 127) {
        return 127;
    }
 
    return static_cast<u8>(midiNote);
}

References A4_FREQUENCY, A4_MIDI_NOTE, fl::FL_NO_EXCEPT, fl::logf(), and NO_NOTE.

Referenced by frequencyToMidiNote(), and update().

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