This is a modification submitted by a mysterious Lomographer known only as Francesca of Italy.
Step by Step guide to Music Panorama mask
Tools: transparent paper/Overhead Projector paper (OHP) – which you are able to photocopy onto, a Holga plastic mask, a photocopier, scissors, some sheet music, your Holga, you and some film.
Photocopy the sheet music onto the transparent paper. Cut out enough of the transparent paper to cover the plastic mask and stick down.