When you consider all of the woodwind instruments in marching bands the numbers mount up.

I am sure that the black wood is only used because it looks good. The difference in sound from different colored woods must be minimal and it is quite possible that other woods might even have an inherently superior tone but just don't look so COOOOOL.

The same can be said for ebony fingerboards on stringed instruments. There are many species of ironwood that might even have a better performance than ebony in that application.