Looking for a simplified notation for piano that is 1) key agnostic but 2) chord and voicing specific. Here's kind of what I'm going for:
The chord and extensions are expressed to the left, and the left and right hands are spelled out to the right of the chord. The music is read from left to right, top to bottom. It would be a new form of lead sheet.
The notes being horizontal kind of more line up with the way the hands are on the keyboard of course, which would likely lead to easier reading and being able to mentally connect the notation with physical note locations.
I want something less specific than traditional staff notation that can be more easily transposed on the fly but that also describes a sophisticated sound.
(In a sense this looks a bit like numbered notation, but it is more generic)
For me, thinking about note numbers (and chord degrees) is more intuitive than trying to transpose chords from staff notation on the fly. It will also train my brain to think about the note numbers associated with the chord symbol while playing at full speed.
If it remains key agnostic, I can more efficiently practice the piece in all keys without having to transpose and write out the sheets in traditional notation.
This kind of notation doesn't specify block chords or arpeggios either... it's just the general hand shapes that should be made.
The issue is the changing of keys... as you see in the above example. What would the fourth chord be? In "Autumn Leaves" it would be a fifth below the I Maj7... but should it be called a IV chord? (Probably not)
The fifth chord of the sequence of course starts a minor ii-v-i... but again in relation to a different resolution chord (i).
My question is... does a similar notation already exist, or how might I finish this notation so that it makes sense.....given that keys change constantly? (I don't want to specify a starting key. I want to keep the music key agnostic)
(it would be kind of like a hybrid of a numbered notation and lead sheet--the chords displayed horizontally to line up with how the hands are actually positioned--without the rhythm specifications)