When I play a scale it's from 'visual' memory (or feeling) of what the pattern I need to play looks like. I can write down the notes of the scale but I have to think about it for a while.
For instance the C major scale starts at C and then it's 2 half steps so next note is a D and then again 2 half steps then you're at E and then comes half a step so F, etc... And when you give me the notes then I can play them but not as fast as I can play a scale from pattern/visual memory...
I mean, we guitarists, we can simply transpose our scales by moving our hand up and down the neck of our guitar so we don't have to think too hard, but how does a pianist do it?
When a piano player is asked to play the G# major scale he can't just transpose his C major scale like we do so what does he do?
- Does he know how to play each and every major scale (and other scales) from visual memory?
- Does he know by heart the notes to play of that scale and plays them accordingly?