Chanter -- If you're gonna learn the bagpipe, you're gonna start out on the chanter. It's the part of the bagpipe that allows a piper to play a tune. People start on it because it's a good idea to learn the fingering before you throw the bag and drones into the mix, because the bagpipe is a complicated instrument and it's best to learn one thing at a time. Note: Only kids compete on chanter.
Adult -- As I said, only kids compete on chanter. Don't ask me why. The adult competitions are for adults who aren't quite grade five level, but want to compete anyways.
Grade 5 -- The lowest grade in piping.
Then there are... Grades 4, 3, 2, and 1. It usually takes people a few years to move up to the next level. And after Grade 1 is...
Professional -- This is for people who have gone beyond Grade 1, which itself is darned good. People who have achieved the professional level are THE best.
And the reason I announce a celebration and then explain all of this? Tall One has moved up to the next grade in piping. It became official just a few days ago.