Sorting suggestion

[Chrimson]

I feel like this has probably been addressed before so if so by all means just ignore this, but I think adding an option to filter out specific instruments in a category would be helpful. I feel like one time when I pulled up the site I could actually do this but I haven't been able to figure out how to do it again, but if there is already a way in place then I'd appreciate a little step by step if it's not too much trouble.