In that case I recomme d the Connections Museum Youtube Channel. They have tons of working vintage telephoby equipment, including a DMS-10. This might even be one of their photos.

can’t really tell much without knowing this package, but ./ is not what you’re looking for. try just “make” or “make clean”, as this is standard syntax for Makefiles. if you are wondering what happens, make looks for a file called “Makefile” in the current directory and executes whatever is inside. in your case it will most likely compile the .c file into an executable

pulse audio and pipewire are mutually exclusive, but pipewire has a pluse module so all your programs can still work even if they dont support pipewire

pipewire will do the trick, might be slightly overkill tho

They have done this before, only instead of using a big weight, they use water. Lookup “Dinorwig Power Station” for a good example.