What is .LY file extension?
Input file for LilyPond, a musical score creation program; contains header information, such as the title and composer, followed by one or more musical scores; each score includes the clef, time, and key, followed by a list of notes and note durations.
LY files are saved in a text format that can be edited with a text editor. They can be processed by LilyPond and turned into printable compositions.
You can see a list of software programs here on easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.