What’s that one note or chord that, when you hear it, immediately makes you recognize the song?

General
1

What is that one note or one chord, when played, you instantly know what song it is?

2

A hard day’s night f any day anytime frfr

2 Likes
3

Total wombo combo chord!

4

We all recognize it when we hear it, but as far as I know, there’s still debate about what it actually is.

5

Beginning of “killing in the name of”

1 Like
6

Yes, the flanger effect definitely makes it instantly recognizable.