-# I use one more, though I'm unsure where I got it. Did I make it up?
-# - DISCNUMBER - number in multi-disc collection
+# https://age.hobba.nl/audio/mirroredpages/ogg-tagging.html (supposedly mirrored from http://reactor-core.org/ogg-tagging.html )
+# specifies more:
+# - DISCNUMBER - if part of a multi-disc album, put the disc number here
+# - VERSION - e.g. "live", "radio edit"
+# - PARTNUMBER - part number if a work is divided across tracks
+# - PART - part name e.g. "Oh sole mio"
+# https://picard-docs.musicbrainz.org/en/appendices/tag_mapping.html
+# - ALBUMARTIST - maps to ID3v2 TPE2