2) How does amplitude work then - ? I'm assuming like this: the magnetic orientation of emulsion on blank tape is random (or more likely fixed side-to-side by an erase head?? something like that). Low levels in recording cause a relatively small amount of the emulsion to reorient longitudinally (back and forth, presenting a + / - storage of amplitude), but not all reorient. Large amplitudes cause more of the emulsion to reorient. Peak amplitudes effectively makes all of the emulsion to reorient. Is THAT correct to amplitude? I'm having trouble understanding tape basics here, but that's what I've come up with!!