Add more items related to music and music production, such as: headphones, a MIDI keyboard, pads/pad controllers, synthesizers, a sampler, a drum machine, microphones on articulated boom arms (like those found in music production studios) complete with pop filters, acoustic foam and absorption panels, a mixing desk, knobs and faders, bass traps, etc. To enhance the aesthetic, you could also add more lights or neon/LED light bars to give the space a more distinct look.