A tree’s year rings are analysed for their strength, thickness and rate of growth. This data serves as basis for a generative process that outputs piano music. It is mapped to a scale which is again defined by the overall appearance of the wood (ranging from dark to light and from strong texture to light texture). The foundation for the music is certainly found in the defined ruleset of programming and hardware setup, but the data acquired from every tree interprets this ruleset very differently.
An excellent example of software that has done this well is in the video game genre, going back as far as 1985 with Nintendo’s Super Mario Bros. It was a game that truly anyone could pick up and play, with an invisible interface that taught you everything you needed to know to get started and become good at it. The screen would only scroll right, so you couldn’t walk left. You could jump, but standing on top of special bricks did nothing, so you would try to jump against them from below. Pipes visibly led down, so you’d try your luck with the down arrow on the direction pad. And at the end of the level, the bonus flag was raised high, encouraging competitive players to jump to the very peak for top points. All of the game’s mechanics were explained in one level, without a single instruction, tutorial or guiding word.