Remork and ryjobil and giuliomoro ,
Okay...I got a few books on the subjects at hand. I have been studying!
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I know some about hardware so far, i.e. so I am not completely blind to the subjects of putting hardware together for circuitry. Outside of those ideas, I found some other libraries that have nothing to do w/ Bela and C++. So, I will keep those ploys to a minimum when discussing things in the chat/forum.
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Okay, giuliomoro , I will look into making the 'preamp' circuit or what you all are describing as a biasing circuit. 2k ohms instead of 5k ohms resistor. Got it and I will use 3.3v instead of 5v since we are dealing w/ the BBB w/ respect to the processor and pin outputs.
So, I think I got it so far. Just doing a bit of cheating here, I am going to order a cheap, analog distortion pedal for making low treble, staticky noises blare out of my 15w amp. Ha. My tiny amp never knew what hit it!
Seth
P.S. I forgot to show off the info. on the Open Source Music Theory. So, here: https://viva.pressbooks.pub/openmusictheory .