Wow, thanks for the welcome and quick reply.
I'm using BIAB Version 2017 (467). I'm using an ASUS laptop running Windows 10. 16GB of physical memory. I don't think it's a computer issue, as nothing else lags.

When I look at the chords in the main window they scroll by synced with the sound. On the lead sheet though it's always exactly one measure behind.
These are just jazz standards that I've loaded in and played.