Short story, he used 'resonators' to pick out the partial tones that are found in complex timbres, more here: [https://en.wikipedia.org/wiki/Harmonic_series_(music)#Partia...] I read parts of it closely to grasp the details of what's meant by 'timbre' ... why a trumpet sounds different from a violin (or, for that matter, one violin from another!) Really useful if you want to get into sound design.
Short story, he used 'resonators' to pick out the partial tones that are found in complex timbres, more here: [https://en.wikipedia.org/wiki/Harmonic_series_(music)#Partia...] I read parts of it closely to grasp the details of what's meant by 'timbre' ... why a trumpet sounds different from a violin (or, for that matter, one violin from another!) Really useful if you want to get into sound design.