Overdubbing has been using in commercial music recordings since the 1920. Les Paul helped to bring the tape version of overdubbing to the forefront in the 1950s. He also showcased tape delay reverb, varispeed/flanging and phasing. All this stuff was old hat by the 1970s. It’s unlikely that any unusual techniques were used to record in the song in question.
It reaffirmed that, no matter the subject, the best and the brightest are found right here. Indeed this forum is the place to...
To talk of many things: Of shoes and ships and sealing wax Of cabbages and kings And why the sea is boiling hot And whether pigs have wings.
Again, much appreciation to all for indulging me in some lighter fare.
That pretty much echos what I said in post 8, although, by the time this tune was recorded by the Tempts, there had been a lot of improvements in audio recording technology.
Per Wiki:
"In 1963 The Beatles were using twin track for Please Please Me album. Beatles producer George Martin used this technique extensively to achieve multiple track results, while still being limited to using only multiple four-track machines, until an eight-track machine became available during the recording of the Beatles' White Album. The Beach Boys' Pet Sounds also made innovative use of multitracking with 8-track machines of the day (circa 1965). Motown also began recording with 8-track machines in 1965 before moving to 16-track machines in mid-1969."
I agree that most of the 'magic' in that tune is due to the skill and artistry of the artists, producers, and engineers.