Even though both of these songs are supposedly sung by Paul McCartney, they are clearly not. "For No One" (1966) was sung by Paul, while a voice double sang "Can You Take Me Back?" (1968). You don't need voice prints to tell that this is not the same voice.
Thank you to Angela Nichols Millard for posting this comp to my Facebook page.
Please see related:
Voice prints, vocal mimicry and technology
Tina Foster is the author of
Email Tina at faulconandsnowjob at hotmail dot com.