One project that I found interesting and relevant was ‘Computer Music Studies’ by _blank and Mikel R. Nieto. The same set of data or code is used to generate both the audio and visual outputs of the final product. I find it interesting that they managed to link audio and visual in such a technical manner.
Another project that I was looking at was Subliminal Glitch by Amnon Owed. Using Processing functions like get(), set(), filter(), blend(), tint() and bitshifting, as well as objects, he created an animation where colored particles collide and create a glitching effect. I like how the glitches are not formed randomly but based on some other underlying code.