We all know that the bass guitar is the foundation of any rock band, creating a depth of sound in a way that no other instrument can. But what do bass guitar strings sound like when they aren't attached to the guitar itself? Below, one intrepid musician experiments with sound by hitting the strings against different materials, each of them producing a unique tone. It's kind of amazing how diverse these string notes are -- in fact, it's not so different from actual music. See the guitar-free bass strings in action below.