The Sims Wire found a script in The Sims 4 CAS Demo files that includes names of The Sims 4 Base Game Soundtrack and Radio Stations.
Please note that this list may not be final!
Electronica:
60 Cyclist – Tokiboo
AN21 and Max Vangeli – Real People
Jacob Plant Featuring Annaca – Reach You
Theory – Frozen
Overwerk – Pressure
Pop:
Jace Jupiter – Obrayzow
Kari Kimmel – Who I Am
Roman Holloway – Vanity
Wri Gaddison – Again and Again
Bella Red – Believe in Me
Romance:
Edie Bridgeford – Zumbray
Joshua Radin – Love In Your Eyes
Juan Lonesome Crane – Never Be Lonely
Skarr – Iffen Dona Bin Gau
Lyle Hampton and the Hollars – Love is True
Alternative:
Chachi and the Chinchillas – Shoby Nye
Ekin – Fawna Benna Slo
The New Saga – In my Head
The Skoddarings – You’re The One that I want
The Persimmon Confidental – Dobie Boppsie Barm
Blues:
Amber Revival – NooBoo Neeb
Ben Ward – Cell Hafta No Hast
Blind Snorty Warhorse – Gee Manray
Captive – High Headed Woman
Cys Matters – That Evil
Luther Lecriox – I’m Gone
Classical:
Ilan Eshkeri – Argument for Violin and Cello
Ilan Eshkeri – Caprice 1
Ilan Eshkeri – Caprice 2
Ilan Eshkeri – Ostinato for Clarinet
Ilan Eshkeri – Piano Nocturne
Ilan Eshkeri – Passacaglia for Viola and Cello
Sim Retro:
Chartlon Pettus – Mayzie Grobe
Jerry Martin – Cascade Bubbler
Jerry Martin – Frolicking Wind Dancer
Marc Russo – Sim Neighborhood
Mar Russo – SimBuy
Mark Mothersbaugh – Makeover
Mark Mothersbaugh – Sims 2 Theme
Marh Mothersbaugh – Sims 2 Uni Theme
Mark Mothersbaugh – Simstation
Steve Jablonsky – Consumerism Simplified
Steve Jablonsky – Sims 3 Theme
Steve Jablonsky – Universal Lobby