Multiple stranded (MS) cables sound more detailed, deep, and focused (smaller sound images) with less sound stage and less bass. So, it is good for string and brass instruments and acoustics/classical music. Generally, MS sound makes feeling bright, excited, and happy.
Solid-core cables sound punch, more energy, and big/thick sound images and stage (the wall of sound) with more bass. SC cables are good for percussion instruments and Rock/fusion music. Generally, SC sound makes felling sad, and down.
We, cable designers, mix wires to make balanced sounding cables (and to sound close to the original music). To make a good cable, we need the best reference audio system to hear cables. A problem is all their audio systems sound veil and un-natural. The veil sound means the signal is broken and distorted and those systems can’t be a reference system. Sadly every audio systems in the world are sounding veiled and un-natural. In the land of blind, the one-eyed man is king. I only know what they are doing wrong. Alex/wavetouch