MIDICR

MIDICR is a simple command line tool designed to repair a corrupt midi file that was saved as a DOS text file by accident.

My earlier program midifix already can repair many invalid midi files. Recently I downloaded some midi files from a newsgroup. The files were corrupt. I could use midifix to make them midi compatible but the program warned that it would lose most of the content because of incompatibility.

A closer look to the content showed that the files contained carriage-return/linefeeds character sequences 0D 0A as known from DOS text files in cases where only 0D or 0A alone should appear. The extra bytes make the file fully corrupt and midifix to give up repairing.

This program tries to locate 0D 0A sequences and replace them by 0D or 0A to satisfy the file format rules. In many cases it is not guessable which byte is to use, in this case it uses 0A. Often this conversion of the bytes works, but their remain cases where the result will stay corrupt.

The program is currently not able to repair tracks that contain 0D 0A sequences which few should be 0D 0A and others 0D or 0A.