nostr:npub1ux2crkcx39gllak7tj5302uf5u4j4ger5p3eyl56dtv4qr44v97s6d5jws it was a common practice to use water pipes as "ground" wire because those are metal, go into literal ground and pretty much go through entire building.

However rubber hoses and plastic tubing as well as other safety concerns made it... less popular.

nostr:npub1ux2crkcx39gllak7tj5302uf5u4j4ger5p3eyl56dtv4qr44v97s6d5jws Ah, so that's modern linux audio.