Using Ray conniff Singers 1960 -1971 as my example How did the male singers Sing As one voice . there are is it 8 men 8 women. Why I say between these dates is After 1971 I personally felt Recording was done on the cheap as technology progressed in the studio, Ray recordings after this sounded like one male voice multitracked. Before they could did this, Im intrigued How did 8 men sing like it was one man
Good example in my link
I have 2 favorite songs of Ray Conniff
For All We Know (We shall never Meet Again )
Come Saturday Morning (The Sandpipers cover Which is sublime)