If you’ve ever played old games with CD audio soundtracks, you’ve probably noticed that the music in these games doesn’t loop correctly. Exactly why this happens is unclear, but it seems to be due to some changes Microsoft made to the The Media Control Interface (MCI) components in Windows Vista and later. To help with this problem, a clever Japanese author came up with the _inmm.dll software suite. This useful program can patch hundreds of old games that use CD audio and fix the music looping and playback problems. If you have an old game and the CD audio is not working correctly, follow our tutorial here and give _inmm.dll a go.