As a rabid Muppet fan, I know quite well that anything- and I mean ANYTHING- can happen in the Muppet world.
Thus it is appropriate that Muppet Zoot, saxophonist extrordinaire, has a unique talent- through a rare technique known as underblowing ;), he is able to get the sound of a baritone saxophone from his alto sax!
Wow, man, Charlie Parker would be proud!