Hi Andrew,

Beatgrids are the single most problematic part music migration, because every software has wildly different algorithms for creating them.

To make things more difficult, some apps fix missing silence found at the start of older MP3s, whereas others don't, which leads to misaligned cue points and grid markers.

However, in your case it might be something different. When you export to Serato, you need to update the ID3 tags in order to save the beatgrid offset to the track itself. Serato should then read this and build the beatgrid from the offset. In most cases it works well but there are still quirks!

What happens if you let Serato analyse the tracks to rebuild the beatgrid?

Remko
MIXO team