Earlier quoted context omitted.
I wonder if there's a bit of survivorship bias with this one. I've never been able to learn relative pitch after trying quite a lot of different methods, ear training app and playing a couple of musical instruments. If you're in a music school then perhaps your baseline musical ability is already relatively high?
I really doubt it, and I am not surprised that apps didn't work. I also don't think playing a musical instrument actually gives as much insight here as you want - it's a very indirect transfer if you're learning via classical methods or if you are learning purely by reading. Jazz and contemporary methods involve a lot more "listen, then play back" rather than reading. If you want to work on ear training and theory, c…
I remember many years ago in my music lessons being shocked that some people can hear multiple notes played simultaneously. I've never found much material on learning this skill.