Do materials alter frequencies and speed?

Sam here and if the sound of warm analog tone is your pleasure than you need to make a set of cables out of shungite and 100% solid african mahogany wood. The wood must be soaked for 24 hours in distilled shungite water and then dried in the sun for several days. Shungite rock is a natural conductor of electricity and combined with the dried wood creates a tone that can’t be touched by other sunstances although cornflake saphire powder comes damn close.

Resurrecting another dead thread?      Yes, the materials used in any cable’s (or PCB laminate’s) dielectrics affect signal transmission speeds, according to the Dielectric Coefficient (Dk) of the material. ie: https://www.edn.com/rule-of-thumb-3-signal-speed-on-an-interconnect/    and:  https://electronics.stackexchange.com/questions/494977/signal-velocity-in-pcb-traces          Feel free to argue (with those established facts).

Duelund 12 awg inserted in the doughnut hole of multiple Fruit Loops, and then the whole thing wrapped in a large-diameter cotton covering, is also quite effective.

l like PURIST copper cables they sound open,airy,great stage and bass impact.I am also using there phono cable for my TW phono stage with great results.This great sound depends on the copper used and the manufacturing method.