The Recording Studio is seen in The Muppet Show episode 313. As Kermit announces, Helen Reddy "swings up a storm in the Muppets' private recording studio." There, Reddy records "Blue" with The Electric Mayhem.
Two sound engineers, one of whom is identified as Roger, work from a control room. They observe that Animal's levels are a bit too loud. They attempt to communicate to him that he needs to tone it down, but Animal is oblivious. The unnamed technician loses his hearing, and he is treated later in Veterinarian's Hospital.
A somewhat similar television production-control room (PCR) is seen in The Muppets during the Muppet Telethon.