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 The Moebius Roll
 By Philippe Rouillé
 
 
 | In Digest 970110 Robbie Rhodes wrote : 
 >[ I once flipped the Ampico roll of "Turkey in the Straw", inverting
 >[ the notes bass-to-treble; the tune was actually (more-or-less)
 >[ recognizable!
 
 May I suggest to try a roll converted into a Moebius strip?
 
 I know there is a score of music which can be put upside down and play the same thing : probably by Mozart (or J. S. Bach ?).  If anyone could find the exact reference, I should be very grateful to him (or her).
 
 It is different from a mirror canon or a crab canon (inversus), which may be read without turning materially the score upside down.
 
 Philippe Rouille
 (Paris, France)
 rouille@cnam.fr
 http://www.cnam.fr/museum/musica_mecanica/
 
 [ A music teacher brought his "fiddle" (a Guarnerius!) to class and
 [ performed a Mozart canon for us.  The manuscript is intended to
 [ lie on a horizontal music table, with the teacher and student
 [ standing in opposition.  Since we had no one to play the student's
 [ part the teacher played both parts of the canon simultaneously!  (He
 [ was formerly the Concertmaster of the Chicago Symphony.)  -- Robbie
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