what if APL notation could be played with a piano/chorded keyboard
it's striking that there is so little visualization packaging, afaik, for APL repls. Even a simple SVD or PCA to show intermediate operations seems pertinent, though I don't work with matrices at that level often
APL is great because it's concrete when you want it to be -- like Josh Horowitz's PANE, you can thread concrete data through (an identity matrix?) and see what happens
the aesthetic motivation for all this ^ is performative matrices, i want to play the music of the matrices