NSF (Nintendo Sound Format, invented by Kevin Horton) is a type of file used to represent NES music. To create NSF files, select Create NSF
from the File menu to open the NSF export window. The song information box allows you to set song name, author and
copyright, as present in NSFs. These are also the text field that are found in
the main tracker window.
One optional setting is available: create PAL song, this will set the PAL flag
in the exported file.
A few other formats beside NSF are also available:
As of version 0.3.5, an export plugin system has been added that allows exporting to custom formats. New export targets will appear in the drop-down menu when export plugin DLLs are added. More info about this is available on the web page.