2. Updating files with convert-ly

The LilyPond input syntax is routinely changed to simplify it or improve it in different ways. As a side effect of this, the LilyPond interpreter often is no longer compatible with older input files. To remedy this, the program convert-ly can be used to deal with most of the syntax changes between LilyPond versions.

Other languages: deutsch, español, français, magyar, italiano, 日本語.
About automatic language selection.

LilyPond — Usage