A small helper class to help deal with midi information

MidiHelper.cs

public class MidiHelper
{
    static string[] __notesShatp = new string[] { "C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B" };
    static string[] __notesFlat = new string[] { "C", "Db", "D", "Eb", "E", "F", "Gb", "G", "Ab", "A", "Bb", "B" };

    public static string MidiCodeToString(int midiCode, bool flats = false)
    {
        int octave = midiCode / 12 - 1;

        if (octave < 0)
            return "";

        int absNote = midiCode % 12;


        if (flats)
        {
            return string.Format("{0}-{1}", __notesFlat[absNote], octave.ToString());
        }

        return string.Format("{0}-{1}", __notesShatp[absNote], octave.ToString());
    }

    public static int FrequencyToClosestMidiCode(float frequency)
    {
        float mid = 69 + (12 * (Mathf.Log(frequency / 440, 2f)));
        return Mathf.RoundToInt(mid);
    }

    public static float FrequencyToMidiCode(float frequency, float tuningA = 440f)
    {
        return 69 + (12 * (Mathf.Log(frequency / tuningA, 2f)));
    }

    public static float MidiCodeToFrequency(float midicode, float tuningA = 440f)
    {
        return (tuningA / 32) * (Mathf.Pow(2f, (midicode - 9f) / 12));
    }
}