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C# MIDI Toolkit

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18 Apr 2007MIT18 min read 3.1M   41.7K   303  
A toolkit for creating MIDI applications with C#.
/*
 * Created by: Leslie Sanford
 * 
 * Contact: jabberdabber@hotmail.com
 * 
 * Last modified: 09/21/2004
 */

using System;

namespace Multimedia.Midi
{
	/// <summary>
	/// Converts a Midi note number to its corresponding frequency.
	/// </summary>
	public sealed class MidiNoteConverter
	{
        // Note per octave.
        private const int NotePerOctave = 12;

        // Offsets the note number.
        private const int NoteOffset = 9;

        // Reference frequency used for calculations.
        private const double ReferenceFrequency = 13.75;

        // Prevents instances of this class from being created - no need for
        // an instance to be created since this class only has static methods.
		private MidiNoteConverter()
		{
		}

        /// <summary>
        /// Converts note to frequency.
        /// </summary>
        /// <param name="noteNumber">
        /// The number of the note to convert.
        /// </param>
        /// <returns>
        /// The frequency of the specified note.
        /// </returns>
        public static double NoteToFrequency(int noteNumber)
        {
            double exponent = (double)(noteNumber - NoteOffset) / NotePerOctave;

            return ReferenceFrequency * Math.Pow(2.0, exponent);
        }
	}
}

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License

This article, along with any associated source code and files, is licensed under The MIT License


Written By
United States United States
Aside from dabbling in BASIC on his old Atari 1040ST years ago, Leslie's programming experience didn't really begin until he discovered the Internet in the late 90s. There he found a treasure trove of information about two of his favorite interests: MIDI and sound synthesis.

After spending a good deal of time calculating formulas he found on the Internet for creating new sounds by hand, he decided that an easier way would be to program the computer to do the work for him. This led him to learn C. He discovered that beyond using programming as a tool for synthesizing sound, he loved programming in and of itself.

Eventually he taught himself C++ and C#, and along the way he immersed himself in the ideas of object oriented programming. Like many of us, he gotten bitten by the design patterns bug and a copy of GOF is never far from his hands.

Now his primary interest is in creating a complete MIDI toolkit using the C# language. He hopes to create something that will become an indispensable tool for those wanting to write MIDI applications for the .NET framework.

Besides programming, his other interests are photography and playing his Les Paul guitars.

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