- "Disco never dies! Music from the time when Liberty City was fun."
- — GTA IV Website
- "Join DJ Karl on a journey back to the heyday of Liberty City when disco never died and electronic music was born."
- — GTA IV Website
- "DJ Karl returns to K109 The Studio with a new mix of club classics from the likes of Chic and Créme D'Cocoa."
- — The Ballad of Gay Tony Website
K109 The Studio is a radio station in Grand Theft Auto IV and Grand Theft Auto: Episodes From Liberty City which plays disco music and is hosted by the late Karl Lagerfeld. The Grand Theft Auto IV version of the station is expanded in the second downloadable episode, The Ballad of Gay Tony.
Grand Theft Auto IV rendition
- Peter Brown - "Burning Love Breakdown" (1977)
- Tamiko Jones - "Can't Live Without Your Love" (1979)**
- Gino Soccio - "Dancer" (1979)
- Suzy Q - "Get On Up and Do It Again" (1981)
- Electrik Funk - "On a Journey" (1982)
- Don Ray - "Standing in the Rain" (1978)
- Cerrone - "Supernature" (1977)
- Rainbow Brown - "Till You Surrender" (1981)
- Harry Thumann - "Underwater" (1979)
- Skatt Brothers - "Walk the Night" (1980)
The Ballad of Gay Tony and Episodes from Liberty City rendition
- Change - "A Lover's Holiday" (1980)
- Rufus feat. Chaka Khan - "Any Love" (1979)
- The Fatback Band - "(Are You Ready) Do the Bus Stop" (1975)
- A Taste of Honey - "Boogie Oogie Oogie" (1978)
- The Trammps - "Disco Inferno" (1976)
- Creme D'Cocoa - "Doin' the Dog" (1979)
- Chic - "Everybody Dance" (1978)
- Sister Sledge - "He's the Greatest Dancer" (1978)
- Sylvester - "I Need You" (1980)
- Sylvester - "Menergy" (1984)
- Stephanie Mills - "Put Your Body in It" (1979)
- Dan Hartman - "Relight My Fire" (1979)
- Peaches & Herb - "Shake Your Groove Thing" (1978)
- Rose Royce - "Still in Love" (1982)**
- Machine - "There But For the Grace of God Go I" (1979)
- Candi Staton - "Young Hearts Run Free" (1976)
A * next to song title indicates song was removed with future updates.
The "american.gxt" file shows that the following songs were planned for this station but did not appear in the final game:
- Alicia Bridges - "I Love the Nightlife (Disco Round)" (1978)
- Chic - "My Forbidden Lover" (1979)
- Gloria Gaynor - "Never Can Say Goodbye" (1974)
- GQ - "Disco Nights (Rock-Freak)" (1978)
- Hamilton Bohannon - "Let's Start the Dance" (1978)
- Michael Zager Band - "Let's All Chant" (1977)
- Peaches & Herb - "Funtime" (1980)
- The O'Jays - "I Love Music" (1975)
- Vicki Sue Robinson - "Turn the Beat Around" (1976)
Grand Theft Auto IV soundtrack:
Episodes from Liberty City soundtrack:
- This is the favourite radio station of Bernie Crane and Tony Prince, and is the default station in Tony's car. It is also one of the two favorite radio stations of the Albanian Mob, the other being Liberty City Hardcore.
- This radio station plays inside the Alderney Safehouse, Hercules and The 69th Street Diner.
- "Menergy" by Sylvester, "Shake Your Groove Thing" by Peaches & Herb, "Relight My Fire" by Dan Hartman and "A Lover's Holiday" by Change plays during the end credits of The Ballad of Gay Tony.
- One of the tracks, "Walk The Night" by the Skatt Brothers, was actually the subject of a rather infamous licensing event. Due to the death of Skatt Brothers lead singer Sean Delaney, Rockstar Games hired a private investigator to track down Delaney's surviving relatives in order to secure the rights of the track as the company felt that the song was extremely important to the game.
- Radio '76 FM - a funk radio in GTA 1.
- Lo-Fi FM - a funk and soul radio in GTA 2
- Futuro FM - a funk and dance radio in GTA 2.
- Fever 105 - a disco and funk radio in GTA Vice City.
- Emotion 98.3 - a radio in GTA Vice City and GTA Vice City Stories that plays a song by Dan Hartman.
- Bounce FM - a funk and disco radio in GTA San Andreas.
- CSR 103.9 - a new jack swing and contemporary soul radio in GTA San Andreas.
- Master Sounds 98.3 - a rare groove and classic funk radio in GTA San Andreas.
- Paradise FM - a disco and funk radio in GTA Vice City Stories that plays other songs by Change and Sister Sledge.
- Vice City For Lovers - a soul and R&B radio in GTA Vice City Stories.
- The Vibe 98.8 - an R&B and funk radio in GTA IV.
- IF99 - a funk radio in GTA IV and the "sister station" of K109.
- Truth & Soul - a funk and soul instrumentals radio in GTA Chinatown Wars.
- The Lowdown 91.1 - a classic soul and funk radio in GTA V that plays a song by The Trammps.
- Space 103.2 - a classic funk radio in GTA V.
- blonded Los Santos 97.8 FM - a contemporary R&B and mixed genre radio in enhaced versions of GTA V.