The Beatles never sat on the stereo mixes for any of their songs because the radio of the time was AM / mono. All the stereo mixes were done by their producer / sound engineers / possibly others without their input. Not that they were cut out or anything; they just didn't care.

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ribfeasty 2 days ago | parent [-]

The Beatles (especially John) also hated the tedium of re-recording vocals to layer them, as is common in audio production to improve the impact of vocals in recordings.

Their engineer ended up coming up with a technical approach we call ADT (Automatic double-tracking) to artificially duplicate and layer the vocals without requiring the artist(s) to re-record vocals.

	▲	IAmBroom 2 days ago \| parent [-]
		IIRC, Richard Carpenter took this to the Nth level. He found the recording equipment with the largest number of tape tracks - 28 - and used them all to layer Karen's voice. She had an amazing voice, but she also stood out because of his technical nuancing of their sound.