The original Awk Music composition is by Kyle Keen. See https://kmkeen.com/awk-music/.
The pink noise generator is based on PinkNoise.java by Sampo Niskane and on the gaussian random number generator by Yu-Jie Lin, which is in turn based on other sources as cited.
The filter code is based on the Audio EQ Cookbook by Robert Bristow-Johnson.
The basic script audio routing code was originally based on example code from Mozilla, though it has evolved significantly in the mean time. See https://mdn.github.io/script-processor-node/.