I use MP3Tag for ~3 years for tagging my FLAC and MP3 collection and really like the software... think I have even donated I mainly use the software for maintain my CD-ripped tracks in both formats, mostly converted using fre:ac software. I use and have some overall knowledge of actions, conversions and auto-numbering tool.
For track numbering, I've chosen such a convention - if the album contains 1 to 9 tracks, do not use leading zero, and if the number of tracks is greater, use it for tracks 1 to 9. The question is, can I set MP3tag to automatically detect # of tracks in album and add or not leading zero according to that?
If the solution is not super straightforward, I don't require definite step by step answer, leading me to a specific tools will be enough. I know basics of command lines and I use regex daily.
Many thanks in advance for any help
PS this is off-topic a bit, bu if someone knows how to set it in fre:ac, I'd be also glad for an advice