Lisp in a laundry basket

​25 years ago, in the last millennium, we created Igor Engraver, a revolutionary music notation software. To promote our work, we printed t-shirts that showcased our dual perspectives: the musician's view and the developer's view. On one side of the t-shirt, we had beautifully printed sheet music titled "Your View." On the other side, titled "Our View," we displayed a piece of code—a higher-order function for creating a transposer function in Common Lisp.

Fast forward to today, as I embark on revivifying these ideas as the open source project "FrankenScore: a Body Resurrected", I suddenly remembered those t-shirts and the key they held to a general pitch representation covering not only diatonic and chromatic but also microtonal music and its transposition. I recalled that I had kept one of these t-shirts.

After searching through my entire flat, I finally found it at the bottom of my laundry basket. Remarkably, the quality of the print has survived 25 years! I took a photo of the t-shirt and fed it into ChatGPT, leading to a fruitful conversation about the ideas behind and generality of this pitch representation.

Thus: document your ideas in whatever way you want - even on t-shirts. Twenty-five years later, if the fabric and print are good enough, they may become the foundation stones on your journey of ... developmental retribution? ;)