Cos had the studio for recording R&B and rock and roll from the late forties unil the mid-sixties. (Dr John, Under A Hoodoo Moon p.72)
Links:
New Orleans Greats Salute Studio Owner Who Helped Create Rock & Roll
Cosimo Matassa, New Orleans recording studio owner, engineer and rock 'n' roll pioneer, has died
Cosimo Matassa, Whose Studio Created a Rock ’n’ Roll Sound, Dies at 88