How to delete Garage Band Instruments

Bob deWitt wrote:

I do not use Garage Band on my computer, but it is taking up 11.55 GB of disk space. I have deleted every file I can find that is associated with Garage Band, but when I query Macintosh HD, it reports that Music Creation is using 11.55 GB of space. How can I recover this space?

ref: Where can I delete GarageBand files?