I would suggest that your bass guitar has much highr frequency componets. The relative amplitudes of these harmonics to the fundamental and each other determine the "sound". This lets us humans distinguish a certain note as comming from a guitar or a piano. You might need most of the...
I am looking for manufaturers of large >50kW permanent magnet synchronous motors with a rotation speed in excess of 40 000 rpm. Anything close will also do.