Quote:
what happens if it's at the step where it's sitting there for X number of seconds in standby mode after ignition shutoff, and, as Bitt suspects, the voltage drops below its threshold *at that moment*?

Actually, I suspect that the voltage drop is at startup. Slowed way down, the sequence of events is:
  1. Key turns ignition sense on
  2. empeg starts booting
  3. key starts starter motor, possibly causing severe voltage drop
  4. empeg finishes booting
  5. empeg goes into standby mode

My suspicion is that the empeg makes a voltage determination somewhere during boot, at the end of the boot, or just before it starts playing as to whether or not there's enough voltage to play properly, and it sees that the voltage is low enough that it should not, and goes into pseudo-standby mode.
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Bitt Faulk