This document discusses a project at the Bavarian State Library to develop a content-based search application for digitized sheet music using optical music recognition. The project tested various OMR software programs and generated OMR data from around 70,000 pages of digitized sheet music from complete editions of composers like Beethoven, Handel, and Schubert. This data can then be searched through a prototype application available at a provided URL, which is demonstrated in the presentation.