How do you decide on a key signature for a song? I don't have perfect pitch so all the key signatures sound the same to me. If it has vocals, I'm guessing it's your vocal range but what if it has no vocals? Do you look at something like the fingerings on a keyboard?
i haven't done a song without vocals in many years. but in that case it would be wherever i first came up with the idea. no sense in transposing anything. this is also true with underscoring music