Top Octave Generator

The software gives an ATmega328P similar functionality to a Top Octave Generator IC such as the Mostek MK50242. 12 square waves are produced on 12 pins, the frequencies being an approximation of a well tempered scale with base note of A 440Hz. Two sources are provided, one for the octave A7 (3520Hz) to G#8 (6645Hz), the other for the octave C#8 (4435Hz) to C9 (8372Hz). The notes are more accurate than produced by the original TOG IC, within 0.1Hz.