Instructions This calculator helps identify all the pitch intervals required when using twelve-tone technique to create a twelve note music composition. Simply enter the 12 starting tones, and the app will calculate the inversions and other forms. If you wish you can generate a random matrix, and also view the matrix as either sharps/flats or pitch class integers. Background Twelve-tone technique also known as dodecaphony, twelve-tone serialism or twelve tone composition, is a method of m