Sound / Frequency on a micro 2017-07-30

I had need for sound on a pic...

Most of my products use a beeper for "Hey! You pressed a button" or "Excuse me! Something is in alarm!!"

This is fine for most applications, but we all know that the micro goes off to play a note / sound and takes the whole duration waiting...

I found some interrupt driven sound routines on the net... One by a guy called Craig Peacock... I like this one because of the note parser he developed... Basically a string with several notes in several octaves in...

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