"analog" way of realtime voice pitch

It's a simple pitch shifter effect avaible on most multi-fx units.

I was not looking for a specific effect, I was just wondering if there existed any "oldschool" method because I always thought real-time pitch shifting (i.e. what you can use in a LIVE situation) is something that might have existed since mid-90s or so (which is wrong, as I can now see by sneakthiefs comment ). The reason why I was thinking this is because I thought it can only be done digitally, and if so then not in real-time, only as a studio effect that needs some computing time. But in that case, I was wrong
And as far as analog goes, I thought the only possible way of doing it would be using tape, but then it's also impossible to use it live. But Smackos told me there was also the Moog Bode Frequency Shifter, which is analog but that sounds very robotic (more like a vocoder etc).

wouldn't an incredibly old-school version be recording say the vocal at a different tape speed and then playing back at the intended speed?

I remember doing this on old 4-tracks when I was a teenager.

this is the one you prolly need