Answer:
I am whole but incomplete. I have no eyes yet I see. You can see and see right through me. My largest part is one fourth of what I once was.
I have 24 keys but cannot open any locks. Sometimes loud sometimes soft
What's the capital of France?
I cannot be felt, seen or touched. Yet I can be found in everybody. My existence is always in debate, yet I have my own style of music. What am I?
I am a band that does not perform sing or act.
Before Google, we actually had to physically look things up in this building full of knowledge.