Amazing thread! Thanks laborcamp for sharing all this, so much awesome stuff here.
I'm a designer/architect and I sometimes struggle with the imbalance between the relative ease of creating finished 2D/3D work compared to the more nebulous and amorphous world of sound. Visual ideas are much easier for me to generate and resolve, whereas musical ideas can be much more challenging to structure and organize.
Just a few days ago I was sketching out the "story arc" of an upcoming live set as an exercise to try and address this gap. It's not really a compositional notation so much as a line graph showing the relative energy of each track in the set. Thought it was worth sharing: