File naming convention for XLD encoding

xld_filename.md

Compilations:

%A - %T  -  %n - %a - %t

Albums by 1 artist

%A - %T  -  %n - %t

Ids (as per https://github.com/gmw/xld/blob/master/XLD/English.lproj/MetadataEditor.xib)

%n: Track number
%N: Total tracks
%d: Disc number
%D: Total discs
%t: Title
%T: Album title
%a: Artist
%A: Album artist
%g: Genre
%G: Grouping
%c: Composer
%C: Comment
%I: DiscID
%y: Year
%f: Format
%i: ISRC
%m: MSCN
%o: Original file name

Apologies @sjogro I did not get a notification about your question - so 2 years later, please let me answer :) According to the MetaDataEditor file you can use %D to access the total disc count. I updated the gist to include this and some more.