What TV dance show used "TSOP (The Sound of Philadelphia)" as a theme?

The TV dance show that used “TSOP (The Sound of Philadelphia)” as a theme was Soul Train.

The recording was created by Philadelphia studio collective MFSB, with vocal contributions from The Three Degrees. Producers Kenneth Gamble and Leon Huff wrote it specifically for the program, which was created and hosted by Don Cornelius. The title avoided directly naming the show because Cornelius did not want the program’s name included on the commercial single.

“TSOP” served as Soul Train’s theme from 1973 to 1975 and became the show’s best-known musical signature. The program later used several replacement themes, including newly recorded versions and songs by other artists, but the original returned in later years. This history can cause confusion: “TSOP” is both a hit record and a recurring Soul Train theme, not the name of the television series itself.

Released in 1974, the song became the first television theme to reach No. 1 on the Billboard Hot 100. It also helped connect Philadelphia soul’s orchestral sound with the emerging disco style.