I know that Thorsten developed the liveprompter app. But as I sometimes use a lot sheet-music, visualizing just the text is not sufficient here. Sadly C3 is not able to view PDFs at the moment.
So is there any workaround to automatically view a PDF when loading a song? Maybe with an external script? Or is there an application out there that listens to MIDI commands and switches to the according PDF on program change?