Do machine spirits really exist, you think? How do you run them in your campaign?
Are they some kind of machine-intelligence, that animates pieces of tech like spirits are said to be inside trees, rocks and rivers in some cultures? Or is this just what the superstitious Adeptus Mechanica has come up with to explain that which they cannot explain: algorithms, computers, artificial intelligence, decisions based on calculations and preprogrammed routine ... in short how all the tech that we even today have in our homes work without us knowing exactly how?
I am with the second option
) the mechanic is manipulating those waveforms to get the desired effect, peaks, lows and noise that the waveform will achieve. Just like the engineers running a steam engine back in the 19th century, they had the rudimentry knowledge to put it together, work out the desired effect, maintain the engine and even instruct others how to use it, but for the most of them they where at a complete loss to explain the analog waveform to the apprentice shovelling coal and wood into the belly of the beast. They could explain the pressures, revolutions per minute of operation and where to put the oil, the more skilled ones can even construct one from existing, tried and true blueprints.