I still make my own cabling. I have specialized tooling to make cables of all types. My preferred base conductor material is round, high purity solid copper or silver 20 awg for analog. The Cu I like the best is OFC highly conductive, Ono cast (OCC),..... Silver is rated at "fine", no use in a higher purity silver.
I have found I prefer the sound balance across the spectrum using 20 awg solid. The way the base material is finished will make a difference. Polished works the best, there are 2 choices: chemical or mechanical. I prefer chemically polished, less dust.
The design I use is a gas suspension using polyethylene tubes that are sealed at the ends. For speaker cables I use 6 strands in separate tubes twisted around a seventh tube. I usually bi-wire my speakers. Hard to beat the performance at any price, but there is better.