Hi Andrew,

thanks for your help. I re-downloaded realtracks155-159.exe and immediately noticed that the size was different to the 2020 version (which I downloaded in Dec 2019 when I upgraded to BIAB 2020).

The problem has now disappeared and the drum tracks match the ones in your screenshot :-)

This is interesting. I updated all RT files when I upgraded to BIAB 2020 in Dec 2019, and in Dec 2020 (last month) I only downloaded the new RT files. I have diligently downloaded and installed every single patch (I check the website pretty much every day for updates), so I am somewhat puzzled that these changes hadn't been part of any of the updates.

Does this mean that I need to download every single RT file (all 100+ GBs) again as part of the BIAB 2021 upgrade process?

Cheers, Paul