His main vocal and the guitar seem to be in a key, but the bass is out of tune and the other parts seem to be in different keys. It's odd but strangely satisfying. Is this considered atonal?
The bass guitar is dissonant but the song foundation is clear. There is a main key which is been held by guitar. In this case the guitar is more part of foundation than bass. It sounds as the bass was forgotten to be tuned and they just left as it is. Atonal would be found more in classical and requires huge effort on arrangements.