Notes and tones harmonize with one another.
Back in my college days, I would sometimes go down into the basement of the campus music building where there could be found row upon row of tiny practice rooms.
Each cubicle had a piano, a music stand, and a small window in the door that allowed passers-by to peer in and taunt the occupants.
The random mix of melodies and rhythms that spilled into the hallway could be deafening.
To most, it was noise.
To me, it was a symphony written in the here and now by composers living in the moment.