MFSB (short for "Mother Father Sister Brother") was a pool of more than thirty resident studio musicians based at Philadelphia’s famed Sigma Sound Studios. They worked closely with record producers Kenny Gamble and Leon Huff and Arranger Thom Bell, and backed up such groups as The Bluenotes, O’Jays, Stylistics, Spinners, Intruders, Three Degrees, Jerry Butler, Wilson Picket, and Billy Paul. Starting in 1974, MFSB started recording for the Philadelphia International label. " TSOP" was their first product, produced in March, and it peaked at Number One. TSOP was most influential in establishing the Disco sound. They later released other successful singles and albums as a stand-alone recording act.
Assembled by the production team of Gamble & Huff, MFSB was the house band for their Philadelphia International Records label and provided both the signature smooth Philadelphia sound that dominated the early 1970s for the acts who recorded at their Sigma Sound Studios, including The Delfonics, The O'Jays, Blue Magic, The Spinners, Teddy Pendergrass and Harold Melvin & the Blue Notes; and the "high hat" disco sounds that dominated the late 1970s with groups like The Trammps, First Choice, Ripple and Double Exposure.
