After escaping the Ink Demon, you'll find yourself in a flooded corridor. Navigate through the ink, being careful not to fall into deeper sections where you can drown. Follow the path until you reach a door labeled 'Music Department'. Enter this area. The Music Department is a large, sprawling section of the studio, filled with instruments, recording booths, and the unsettling presence of Sammy Lawrence's influence.
Inside the Music Department, you'll encounter your first 'Searcher' enemies – blobs of ink that will attack you. You can defeat them with a melee weapon (like the axe you'll find soon) or simply avoid them. Your immediate goal is to find a way to drain the ink. Explore the various rooms, including Sammy's office and the recording booths. You'll find several audio logs from Sammy Lawrence, detailing his descent into madness and his worship of Bendy. These logs are crucial for understanding the narrative.