[@Muttonhawk] There's a certain genre of music - I like to call it 'Study Music' - that might or might not fit what you're looking for. Watch out though, they're all like, one hour, three hours, six hours, ten days...

To my misfortune, I have sat through this one more times than I can count:
[youtube]https://youtu.be/WPni755-Krg[/youtube]

The beginning of this one seems alright:
[youtube]https://youtu.be/6pC9nB4Ix7Q[/youtube]