In this paper, we present the SyncPlayer system for multimodal presentation of high quality audio and associated music-related data. Using the SyncPlayer client interface, a user may play back an audio recording that is locally available on his computer. The recording is then identified by the SyncPlayer server, a process which is performed entirely content-based. Subsequently, the server delivers music-related data like scores or lyrics to the client, which are then displayed synchronously with audio playback using a multimodal visualization plug-in. In addition to visualization, the system provides functionality for contentbased music retrieval and semi-manual content annotation. To the best of our knowledge, our system is moreover the first to systematically exploit automatically generated synchronization data for content-based symbolic browsing in high quality audio recordings. SyncPlayer has already proved to be a valuable tool for evaluating algorithms in MIR research on a lar...