There are a few more replacement parameters based on the file itself:
b,basename: The file basename
E,extension: The file extension (including the dot)
Both of these take the same “The,”, capitalization & whitespace options as Tag-Based Replacements.
5,md5: the MD5 checksum of the file’s audio data
S,size: the file size, in bytes
Both of these take the following options:
base=(decimal|hex): specify the radix for the numbers
hex-case=(U|L): case to use for hexidecimal numbers