Originally Posted by lonelyangel

Don't worry. Tin mute just means harmon. Or rather harmon - which is a brand name - means tin mute. In the UK we like to say that we will dyson the carpet rather than hoover the carpet - but we still mean vacuum cleaning. I can see your logic but the paradox may be due to the parts for the show having been written by various copiests or perhaps the scores for some songs being written by different arrangers who favoured one term over the other.

All the best. Noel.