---&---
I listened to A Hard Day's Night this morning, and I noticed a few things that I've been oblivious to, even though I've been listening to the album weekly for months. Mostly, the things I noticed were just piano parts I hadn't realized were there. (They're in "Tell Me Why," where I think it just doubles the bass part, and in "When I Got Home." A few months ago, I discovered that there's one in "Things We Said Today" too.) I'm pretty sure the CD copy I have of the album is in mono, which makes it a bit more difficult to distinguish the individual parts.
The other thing I noticed was in "Any Time at All." Almost the entirety of the verses have doubled-tracked vocals except for the beginning of the fourth line. In the first verse, the "If you're feelin'" part is just a single voice, but there's a second for the "sorry and sad." Way back in March, I noted that alliteration, but the double-tracked vocals there emphasize it, since there's a second pair (a pair of words beginning with S and a pair of vocals).
In the second verse, the "When you need a" has a single voice, and "shoulder to cry on" has two. The single/double-tracked voice feature here is more interesting. There's a single voice for the part of the line that indicates a lack ("When you need"), and a pair of voices for the part that offers assistance.