I've been playing with the Shuffle (album) mode again and it's behaviour is getting weirder with each release

With a multi-disc release, instead of playing from the first track of the first disc to the last track of the first disc followed by the first track of the second disc to the last track of the second disc, etc. it has a very strange behaviour. Here's a summary of different test cases (different audio formats and different tags if it makes any difference):

MP3 (a two disc release using the PARTINSET tag for the disc numbers):
- Play first song of the first disc
- After the first song of the first disc it will jump to the second song of the first disc
- After the second song of the first disc it will jump to the second song of the second disc
- After the second song of the second disc it will jump to the third song of the first disc again.
- Etc.

MPC (a two disc release using the DISCNUMBER tag for the disc number):
- Play the first song of the first disc
- After the first song of the first disc it will jump to the second song of the second disc
- After the second song of the second disc it will jump to the second song of the first disc
- After the second song of the first disc it will jump to the third song of the second disc
- Etc.

OGG (a three disc release using using the DISCNUMBER tag for the disc number):
- Play first song of the first disc
- After the first song of the first disc it will jump to the first song of the third disc
- After the first song of the third disc it will jump to the first song of the second disc
- After the first song of the second disc it will jump to the second song of the second disc
- After the second song of the second disc it will jump to the second song of the third disc
- Etc.

MP3 (a four disc release using using the PARTINSET tag for the disc number):
- Play first song of the first disc
- After the first song of the first disc it will jump to the first song of the third disc
- After the first song of the third disc it will jump to the second song of the second disc
- After the second song of the second disc it will jump to the second song of the third disc
- After the second song of the third disc it will jump to the second song of the fourth disc
- After the second song of the fourth disc it will jump to the second song of the first disc
- Etc.

I hope it's of any use...


P.s. Would it be possible to change the behaviour of the random button in Shuffle (album) mode so it will jump to the first track of a random album?

Use "DISC" tag instead.

Would it be possible to add PARTINSET and DISCNUMBER as mappings for DISC? These two tag names are common used names for ID3v2 and Vorbis tags.

Also, if I would change PARTINSET to DISC for ID3v2 tags, will this still be stored in the TPOS frame?

I've changed most of tag readers to report DISCNUMBER instead of DISC etc for next beta. Both %DISC% and %DISCNUMBER% will remap to DISCNUMBER/DISC check so existing scrips don't break.