The technology they use at the Musical Instrument Museum makes visiting worthwhile. You get headphones and a receiver as you enter, so when you approach a display, like this one, you can see and hear an instrument being played. Same goes for distinct styles of music or geographical regions. So, if you approach a jazz display, you'll see video of jazz performances and, of course, hear the accompanying music. If you approach a display on the music of Tibet, you'll see and hear Tibetan musicians.
For more information on the museum, check out the Arizona Travel and Adventure blog I maintain with two other writers. We'll be blogging about the Musical Instrument Museum throughout the week: http://arizonatravelandadventure.com/?p=623.