Multidisc Albums

[media type]=[audio] -[Genre]=[Audiobook] ~dup=[Artist],[Album],[Disc #],[Track #] ~sort=[artist],[name] ~a

I number my multi-disc albums as follows:

Disc	Track	Album	Artist	Name
1	1	Album name	Artist Name	Disc 1 Track 1 Name
1	2	Album name	Artist Name	Disc 1 Track 2 Name
:	:	:
1	n	Album name	Artist Name	Disc 1 Track n Name
2	1	Album name	Artist Name	Disc 2 Track 1 Name
2	2	Album name	Artist Name	Disc 2 Track 2 Name
:	:	:
2	m	Album name	Artist Name	Disc 2 Track m Name
:	:	:

This smartlist allows me to find all the Discs that don't have Disc # set appropriately. NOTE: I don't set Disc # for single disc Albums.

It would include an Album if it found the following tracks:

Disc	Track	Album	Artist	Name
	1	Album name	Artist Name	Disc 1 Track 1 Name
	1	Album name	Artist Name	Disc 2 Track 1 Name

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Alternatively, for those who append (disc #) to their albums, eg 'The Wall (disc 1)', the following can be used to find all such entries that don't have the field [disc #] set:

[Media Type]=[Audio] [Album]="/(disc " [Disc #]=[] ~sort=[Album]