That's the ropiest looking MIDI cable I've seen in a long time. Assuming it's wired as a MIDI cable that it - the connectors at least are correct. I'd probably bin it either way.
― Being cheap is expensive (snoball), Saturday, 30 April 2022 15:34 (nine months ago) link
it's 30+ years old is my only excuse (i have four in all, in no better condition: i have no idea what i used them for once upon a time)
― mark s, Saturday, 30 April 2022 15:50 (nine months ago) link
It’s most likely a 5 pin audio DIN cable, used to plug a tape deck into a receiver or similar instead of two RCA pairs.
― assert (matttkkkk), Saturday, 30 April 2022 21:57 (nine months ago) link
5 pin audio DIN seems to be the consensus, most likely for a tape deck
― mark s, Sunday, 1 May 2022 12:45 (nine months ago) link