I've finally got round to playing another tune.  I stole my wife's flute to play it as I can't remember where I left my own.  The fact that this recording sounds like it was made in a sewer is no reflection on the flute.  The recording wasn't made in a sewer; I'd never bring someone else's instrument into such an environment.  Now I come to think of it, the same flute was once found in a wheelie bin after a burglary.