type
Here's some of what people around the Joshternet have been publishing about this subject. Different websites, different perspectives, and a few more places to explore.
Josh Urban Davis (opens on the publisher’s site)
joshurbandavis.com
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Every position has pressure, protection and silence. Move a piece and hear the relationships change. Colored outlines reveal what the music responds to: attacked pieces add tension, protected pieces sustain, and crowded pieces become quieter. Full chess rules apply; piece type sets the instrument, color sets its register, and the sound palette is yours to choose.