When I've analysed music specturally through Audacity, then I think you could get away with saying that a lot of music is High Passed at 30Hz, but not 40Hz - ie there's not a lot of music with meaningful content below 30Hz.
Here is a random pop song I pulled off YouTube, you can see it's already -12 dB at 40Hz, and it's already at the noise floor at 20Hz.