The Voyager theme (which is objectively the best) now also got the diegetic music treatment by Auralnauts.

Here are links to the other shows:

• Star Trek: TNG Theme but the theme is coming from the Enterprise-D
• Star Trek: DS9 Theme but the theme is coming from DS9
• Star Trek: Enterprise Theme but the theme is coming from inside the Enterprise NX-01 (this is the funniest imho)