Ian,
You could start with the info page as a popup and place the link to a song where one exists on that layer; I'd guess you're headed in that direction. A cleaner way would be to make the popups 'class' layers (at least that's what I call them). That way you can have a single return link that stops the song and closes the info layer (cleanly), even when a video is playing! Where a song is not available you simply omit the note symbol.
Take a look here:
https://initiostar.co.uk/demo/Waterways/index.htm ||
Jukebox-Waterways.xar
Gary
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