I guess many of us will have done what I did and made mix CDs (OK, tapes, I'm that old!) and playlists for atmosphere. As GM I demand the right to select the sounds and come over all dictatorial about it. Perks of the job and all that.
A selection from our 'Space Dog' (The Ship's name, from an adventurous Tori Amos track I'm very fond of) soundtrack selection includes Vangelis, Vernon Elliot's Clangers album (A must!), Brian Eno (Apollo Atmospheres is compulsory listening surely?), Giorgi Ligetti, Beethoven, Holst, Hawkwind, Genesis, Rush, Van Der Graaf Generator, Strauss- both flavours, Tangerine Dream/Klaus Schulze, Orb, Pink Floyd, Kraftwerk, Magma, Kate Bush, Boards of Canada, Gong, Anekdoten, Jean Michel Jarre, Anthony Phillips keyboard pieces, Susumu Yokota, Pure Reason Revolution, Jan Garbarek, Steve Hackett, Osric Tentacles, Rammstein, Flaming Lips, Sigur Ros, Einsturzende Neubaten, Hitchhiker's Guide Soundtrack and classic TV and movie themes - Blake's Seven, Dr.Who, the stunning Forbidden Planet soundtrack album by Louis and Bebe Barron, various John Williams and Ennio Morricone themes, Battlestar Galactica...
In fact, Space Trucking, the interstellar freight company our heroes have been working for for all these years is named after a Deep Purple song. Prog rock seems to have been invented for this very purpose! In game our Comms officer is a kind of Cosmic blogging DJ specialising in Old Earth youth music. I have serious avant-garde polyphonic atonal tempo shifting ambient strangeness as the default continual airplay music pervading the Imperium. The kind of thing your granny used to love being unable to tap her feet or hum along to. Ye ancient simplistic olde terran rock sounds are being adopted by young wannabee rebellious types throughout the galaxy.
Our heroes even had a scenario chapperoning Meson Scream, lead singer of Imperial rock legends Spinal Mount (Tap allusions intentional! 'The ancients...no one knows where they came from or what they were doing...') through the marches. Our AC/DC loving Comms officer saw out the end of the scenario in rehab after becoming a drug addict!
P.S. Lord High Munchkin; going back to play bass in the Lesbian rock band 'wasn't that exciting!?.' As requested I won't ask but don't knock the rock n' roll lifestyle cred brownie points!