60fps imported .wav audio slow-down?

Hello everyone.
I have an audio issue with a recent project.
I created a new comp, set on 60fps (it's for social media, they say it's better?). 
All is good until I drag the .wav audio I previously imported (music) I want to use as background music into the comp.
It sounds all slowed down. I initially think it was the RAM preview which usually makes it sound like this, but it kept sounding the same even when everything was correctly loaded.
I tried to create a new comp at 30fps: the song sounds good.
I also tried to test a 120fps comp (it's even more slowed down) and a 10fps comp (it sounds like the chipmunk).
So, it looks like the FPS of the comp affects the length/sound of my audio.
So I  rightclick-interpret footage as I usually do when footage has mismatching FPS, but there are no FPS on audio (ofc). Everything is greyed out and it seems like there's no way to set anything to make it interpret it correctly??
How do I fix this? And also, how do I know how AE set this up? I could work at 24 vs 30 fps comps and there could be a minimum audio distortion without noticing it?