SNDH-ED is an editor which allows you to modify SNDH music files. Things like Composer Name, Song Title can easily be edited without the need to be a competent programmer. SNDH-ED is also the first program to support the new SNDH v2 specification which allows new features such as song length. Finally SNDH-ED also gives you the ability to load your Sid Sound Designer files (TRI/TVS) and save them as SNDH complete with your desired header. Read the docs for further info on the program and the new SNDH v2 specifications.