Web Applications for Automatic Audio-to-Score Synchronization with Iterative Refinement

The task of aligning a score to corresponding audio is a well-studied problem of particular relevance for a number of applications. Having this information allows users to explore the materials in unique ways and build rich interactive experiences. This contribution presents web applications that deal with the problem by implementing a two-step synchronization process. The first step implements a score-informed alignment while the second one can be seen as a further refinement, particularly useful for a previous manual or semi-automatic synchronization. These web implementations are specifically conceived to work with the IEEE 1599 standard, which allows for multiple instances of scores and audio renderings to be mutually synchronized together. By adopting web technologies, users are not tied to any specific platform. Evaluations of the performances and current limitations of these processes will be presented.