This chapter explains options specific to each of the possible output formats. One or more outputs or backends may be selected with the OUTPUT setting. Most options are passed as keyword/argument pairs via this setting or in the OPTS slot of the PART class. Current possible output symbols are :DATA or :FOMUS, :CHUNK, :NONE, :MUSICXML, :MUSICXML-SIBELIUS, :MUSICXML-FINALE, :CMN, :LILYPOND and :MIDI.

The base output filename is specified using the FILENAME setting. It may be overridden by the filename option present in each of the outputs. Each output adds its own extension (for example, a LilyPond file gets a .ly extension added).