This article is from the Miscellaneous Macintosh FAQ, by Elliotte Rusty Harold email@example.com with numerous contributions by others.
Balthazar will play Windows .wav files and convert them to
System 7 sound files. Brian's Sound Tool is a free drag and drop
sound conversion utility which converts to and from Mac sound files
and Windows .wav files. It also converts Soundblaster .voc files,
UNIX .au files, and AMIGA AIFF files to Macintosh sound files.
MacTracker and SoundTrecker will play and convert Amiga
MOD files. See
To play MIDI files you need QuickTime 2.0 or later, bundled with
System 7.5 and probably available on a local bulletin board. You
also need an application that can play Quicktime movies such as
If the MIDI files come from another platform (such as a post
in alt.binaries.midi) you first need to change their file type to
"Midi". Any standard tool such as ResEdit or FileTyper can do
this. Alternately you can use Peter Castine's free drag and drop
application MidiTyper. See
From within your Quicktime savvy application select Open...
from the File menu. Click once on the file you want to convert.
If your file doesn't show up in the dialog box at this point
then you didn't correctly set its file type. Remember that the
file type needs to be "Midi" with a capital "M" and a small "idi."
The "Open" button in the standard file dialog box should change
to "Convert." Click the Convert button. The file will be
converted to a Quicktime movie your Mac can play.