You do realize, don't you, that most high-quality microphones (dynamic, condenser, and ribbon) use changes in a magnetic field to create the electronic analogs of the sound waves striking their diaphragms? Only crystal and ceramic mics and piezoelectric pickups do not.I am not familiar with the list of instruments you provided. I believe a good way to look at what is not an acoustic, is an instrument that uses changes in magnetic fields such a pup. Piezo pickups, microphones, still fall into the acoustic definition, This definition does exclude some early guitar players who used steel strings and a single coil pickup on an acoustic guitar from being defined as acoustic. (And that my friends is a new can of worms, we can use to tempt our basses).
regarding electronic music definition, too narrow, as any music stored on my android would be considered electronic, even if its Clapton's Liala unplugged. I never liked vinyl or lacquer records.
