Rewind a little during play?

[pdxdjazz]

Is there any way to go back to a specific point in a song (but not start over entirely)?

No, not within the app.

You can pause a track as it plays and pick-up from where you paused, but every time you stop the player, it will compile an entirely new track before the count-in when you touch play.
If you long press on a measure, you chose to start play from there. The player will compile a new track and after a count-, will start play from the measure you selected.
That's actually a feature which makes the player more like a live band.
You can loop-play a user-defined section over and over, but you can't just "jump back a bit". (Unless you export the audio or midi to another device, and randomly access the [now static] track there)
)BOB