For inserting image tag, all I read is using expressions like %album% and %artist%, but not just the filename without extension (apparently _FILENAME is the whole thing, e.g. joe - songA.mp3).
Q1) What do I use to declare the filename without extension?
Q2) Regarding those other expressions, like %album%
Are they case-independent? How is a field like Album Artist handled? Is it %album artist% or %'album artist'% (single quote to delineate a string with blanks) or something else?