Since, the notes in music theory (A-G) are cyclic, how do tell which key is higher and which one lower?

Question

Since, the notes in music theory (A-G) are cyclic, how do tell which key is higher and which one lower?

In: Other

Answer 1

Please pardon my ignorance and lack of details in the question. I play acoustic guitar. When I feel like the key that the song is composed in is making me sing in a pitch too high, I move the capo backward and that allows me to sing comfortably but I never understood the theoretical basis for this. I learn from guitar lessons on youtube and I have heard people say that, for example, this song is composed in the key of F# which maybe too high for you so you might want to move the capo backward. That’s what my question refers to. Is there a general way to tell which key is higher and which one lower?

Thanks to all those who have replied to my post!