Playing a (multi-page) PDF in the VST Viewer in sync with an audio file possible?

Sorry for the delayed answer - vacation time. :blush:

What you can actually do is set an automation for Quick Control 6 “Page”. For example, choose CC1 (Modulation) as the desired MIDI remote command (you can choose any other command as well, e.g. Note On). As in the above example choose any Virtual MIDI port of your choice for the automation.

Now create a MIDI track and route it to that VM port. Draw in a few CC1 event at the desired positions and set their value to the page you want to jump to. Now the PDF should follow your arrangement.