How many museums can you think of ANYWHERE that have a significant amount of music-related exhibits?

Well, I can think of a few:

The Experience Music Project in Seattle. (I just noticed they added "Science Fiction Museum" to their title. They didn't have that when I was there a few years ago. It was 100% about music.)

I once saw a very good traveling exhibit about Woody Guthrie at the Tacoma Art Museum, in Tacoma, WA.

And I saw another traveling exhibit about Bob Dylan at the Weisman museum in Minneapolis.

The Schubert Club in Saint Paul has a permanent collection of historical instruments, mainly keyboards. This is a very small museum.

So my impression is, there are a few museums that specialize in music; and a few more that occasionally have temporary or traveling exhibits about music, but the majority of museums have practically nothing about music.