I have worked in/for a couple of studios, and have toured several others. Most of what I have experienced is bulk cables, cut to length using a mix of connectors. The engineers don't take the time to even match lengths, let alone brand.
Do Recording Studios Use Silver Cables
Some of the best cables are made of pure silver. Do recording studios use silver cables? I would think that top recording artists would want to use the cables that sound the very best.