Dave you are correct in theory, But I've been using a ( good quality) RCA audio cable for 25 years now with my 01V. Of course with any cables always use good quality. They are just standard Beldon instrument cable with standard stainless RCA jacks. My cables where bought to use professionally with my Cassette and CD players. The consumer grade cables will work but they are not a good idea.
Anyhow we need to find out how in heck the OP actually heard
anything analog out of those ports. If he did then that's very weird. There's almost the same thread in the Hardware forum right now.