Back in the day...
Just before Tascam came out with the Portastudio there was the TEAC Model 124 SYNCASET STEREO CASSETTE DECK which allowed you to record to a cassette and then rewind and record again (dub)onto the same cassette, blending the two recordings.
Fairly high end at the time, before all the dual dubbing decks came out (soon after I bought it!).

Of course once you over dubbed it was written in stone so it was wise to copy the first and subsequent takes to a second cassette deck in case your next take was a missed take.

Then of course you had the problem of possibly speeding up or slowing down the original track if the two decks were not in perfect speed sync (which mine were not).

After a few takes ping ponging between the decks I was giving Alvin and the Chipmunks a run for their money.

Ahhh yes...the good old days!

Carkins

PS I guess you could approximate that tedious retro process by recording into RealBand,save the track to a rewritable CD, Play the CD through headphones while playing along into RB.
Rinse repeat.
No sync/latency issues but a lot of wasted time.