Right, key signatures aren't just shorthand, they're useful information to give the performer up front.
In fact, it's so useful to state the key up front, I might even suggest the opposite; base the notation on relative pitches, as in "movable do" solfege. Then we could replace "all F's and C's are sharp" with just "do is D". Of course, there'd be tradeoffs to this as compared to the traditional notation, but it's fun to think about.
In fact, it's so useful to state the key up front, I might even suggest the opposite; base the notation on relative pitches, as in "movable do" solfege. Then we could replace "all F's and C's are sharp" with just "do is D". Of course, there'd be tradeoffs to this as compared to the traditional notation, but it's fun to think about.