I pinged you on IRC about this one, but I figure the best place to ask is here! This utility looks great to create on-the-fly playlists for mpd, so thanks for creating it. I have followed your installation instructions, and when I test with for instance beet2mpd albumartist:Queen I get the following error message:
Use of uninitialized value $ENV{"XDG_MUSIC_DIR"} in quotemeta at /home/wazabees/perl5/bin/beet2mpd line 36.
I have xdg-user-dirs installed and I get the correct path when typing xdg-user-dir MUSIC. Any clues?