Technical Notes: As of this writing, Apple’s iPads and iPhones do not seem to support playing midi files. However, after some research, I find that there is an app for that; Sweet Midi, from Roni Music, the same folks who brought you Amazing Slow Downer. It will actually do much more than play midi files on your Apple tablet or phone, but that alone is worth the modest price of the app.
Also, unlike Firefox and Internet Explorer, in Chrome, links to .midi files don’t open a player but offer only to let you download the .midi, which you can then open in QuickTime, Windows Media Player and most other desktop players.
Chrome also seems unable to open midi files that use the file extension .mid. It may be possible to rename such a file by adding an i to its file name, but I’m finding the whole issue of midis on the Web to be fluid and often unreliable.