I have been a HiFi enthusiast for more than 50 years, having started in Vacuum Tube era.  As at the time the electronic design business in  Southern Alberta was virtually non existent, I pursued training on my own, hoping to find an opportunity after taking an Electrical Engineering degree at U. of A. University in Edmonton.  Also in my early days I started to get interested in Digital Computers, and at university, after completing my engineering degree, I pursued a degree in Computing Science.  I joined Alberta Government Telephones, worked in their engineering department and eventually the operational systems side (systems that support control and maintenance of their network).  I have long been interested in cross coupling the two disciplines, and the exercise documented here is an example of this.   

Digital Synthesis is the method used to create the pure waveforms that I have built.  The mathematical Sine function present in the support library for C programming was used to determine the amplitude values for the wave at the digital times in the digital sequence.  As the Sine function is pure, that is, it contains no harmonic additives, the tone file will contain no harmonics, and when the digital file is played, the purity of the tone should be as perfect as the player can render it.  Some distortion may be introduced by amplifiers or speakers involved, but the originating tone will be as good as the D to A playing device can make it.