... except for that bit of Italian accent, which proves it really is him singing all the parts. And he explains what he's doing in that charming accent in a series of YouTube videos. Here he is with "Nowhere Man":
Frudua doesn't talk about the personalities of The Beatles, but his demonstration made me think about the way John was singing his song, and George (with the lower voice) harmonized by going more toward monotony, while Paul (with the higher voice) got fancier and more dramatic, making the backup into the show-off spot. George, you might say, was modest and self-effacing, while Paul was competitive, to the point where he almost seems to be daring John to slug him for taking over his song. And yet the sound is of 3 men blended perfectly.
It's fascinating to me that Frudua is so finely tuned to the details of sound, yet retains his accent. Maybe he's choosing that. If so, it's a nice touch.