- "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 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 and Hercules.
- Fever 105 - A radio station in Grand Theft Auto: Vice City which also plays disco music.
- Bounce FM - A radio station in Grand Theft Auto: San Andreas which also plays disco music.
- Paradise FM - A radio station in Grand Theft Auto: Vice City Stories which also plays disco music.
- Flashback FM - A radio station in Grand Theft Auto: Liberty City Stories which also plays Italo Disco music.
- Space 103.2 - A radio station in Grand Theft Auto V which also plays disco music.
- Emotion 98.3 - A radio station in GTA Vice City and GTA Vice City Stories which plays another song by Dan Hartman.
- The Lowdown 91.1 - A radio station in Grand Theft Auto V which plays another song by The Trammps.