From Philadelphia, Pennsylvania, Man Man is known for exciting and exuberant live performances and playing a variety of instruments including (but not limited to) clavinet, sousaphone, melodica (that's the mouth organ), saxophone, trumpet, French horn, flute, euphonium, marimba, xylophone, piano and your standard rock band gear - guitar, bass, drums - as well as a variety of percussive instruments including pots and pans, kids' toys and noise makers. The best description I've read for their sound is in a wikipedia article where they are described as "Viking-vaudeville, Manic Gypsy Jazz." Yeah, I can go with that.
Banana Ghost by Man Man from the 2006 album "Six Demon Bag", video directed by Jeremy Mayhew
And a live performance of the same song at SXSW 2008 in Austin, Texas (just in case you enjoy live footage as much as I do). So much fun! A melodica!
The official website for Man Man
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YouTube channel for Man Man