Whoever listened to you squeak through a clarinet for a year earned a thank-you you never gave. Give it now.

Learning anything in public is loud and bad for a while, and somebody has to be in the building for it. A year of scales through a wall is not neutral; it is something endured on purpose by a person who decided your getting better mattered more than their quiet. That kind of patience rarely gets thanked, because it looks like nothing happening.

Name the person. It might be a parent, a neighbor, a sibling who shared the wall. Tell them you know what it cost and that you remember. Late thanks still land, and this one will probably land harder than it would have then.