Playback start/end offset

Where can I find a definition of what the numerical values for these properties represent?

I assumed it was % initially, but when the 1/8 the same value as the 1/4 note, their offsets align… (if they were %, I’d expect the 1/4 offset to be 2x the offset w/ the same value input).

The playback start and end offsets are measured in ticks, and Dorico uses 480 ticks per quarter note.

Great… thanks, @johnkprice !