Salzburg’s merry Glockenspiel plays tunes from Haydn and Mozart. Built at the beginning of the 18th century, it has 35 bells in total, with a range of over three octaves with all semitones. You’ll find it standing kitty-corner to Michaelskirche on the Residenzplatz; it carols daily at 7 a.m., 11 a.m. and 6 p.m.
(Glockenspiel aficionados may also want to investigate the charming piece in Graz.)