What is Pre-FM
I've just downloaded a White Stripes show from DIME which is described as "SBD->DAT->Pre-FM" but the frequency and spectral analyses seem to me indistinguishable from what I'd expect from an FM source: 15 KHz cut-off, some "noise" above that and a 19KHz pilot tone.
What exactly is Pre-FM and what characterises it in terms of analyses ?
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