I'm a rebel!
So last night I pulled out my 5-string and played around a little bit in the key of Gb major - a key that has nothing in common with Am!
Musically, it was very satisfying, but I'm afraid I might have caused a matter-antimatter inversion flux in the time-space continuum and created an anti-Bapu.
I don't think he'll post here though.
In order, then, to discover the limit of deepest tones, it is necessary not only to produce very violent agitations in the air but to give these the form of simple pendular vibrations. - Hermann von Helmholtz, predicting the role of the electric bassist in 1877.