Comment 2 for bug 1784185

When the DJ isn't using master sync, we have to guess which deck they want to sync to. I think the reasoning was: We should pick a playing deck as a reference, and absent any other information, the first one will do.

In the second case, if there is no playing deck, then the last-loaded deck was likely to be the one the DJ was just listening to, so that seems like a fine sync source.

First-loaded doesn't seem right to me because that track is probably further back in the past, but since this is a case where no other deck is playing, it may work fine. An alternative consistent logic could be, in order of priority:

1. Sync to master clock
2. Last-loaded playing deck if possible
3. Last-loaded non-playing deck if necessary