Do Recording Studios Use Silver Cables

Applying this logic they would use gold not silver. 

Gold cables haven't proved popular

Wonder why?

But there are plenty of gold-plated connectors.  Gold doesn't oxidise, so this obviates the need to clean connectors often.  In many cables the cores are sealed by a partial vacuum that reduces the rate of oxidation, obviating some of the benefit of gold cores.  Note, if you've ever opened up an old copper cable after years of use the cores are all blue.

Call some Pro dealers like Sweetwater and ask for silver cables. Get back to us with how many you found. For extra points do the same with manufacturers of pro equipment who use silver where copper would suffice. That should keep you busy for a while.

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.

Fools prattle on about silver, ignoring what make cables sonics differ. Dielectric and geometry explain six nines of cable sonics.

Internally, electronics have umpteen metal, plastic and resistive interfaces. SS gear adds uncountable metal / semiconductor interfaces. Tube gear adds oxidizing metal interfaces.

Cables are tone controls and are system specific. See ieLogical CableSnakeOil