Need Info on "The Wall" Session Musicians

Hi. Suddenly I've become very interested in the contributions that session musicians made to the recording of "The Wall" both in the studio and on stage (specifically, the "Is There Anybody Out There?" release). In addition to the list I'm about to present of the contributions that I know of, can anybody else give me any names and the songs they played on, or answer any of my questions below? Your help would be appreciated. Any ***'s refer to a question about that musician.

(This list is based on an interview with David Gilmour, and liner notes.)
JEFF PORCARO: Drums on "Mother"
JOE PORCARO: Snare on "Bring the Boys Bach Home"
FREDDIE MANDELL: Hammond on "In the Flesh (1&2)" ***
LEE RITENOUR: One of two high strums on "Comfortably Numb," some rhythm guitar on "Is There Anybody Out There?"
*** - Gilmour says that Mandell played the Hammond on this song because, quote "Rick for some reason wouldn't get his elbow on the keyboards." What does that mean???
ISLINGTON GREEN SCHOOL: "Another Brick Part 2" kids
BRUCE JOHNSTON (of the Beach Boys): Backup vocals on "The Show Must Go On" ***
TONI TENILLE: Backing vocals on ???
JOE CHEMAY: Backing vocals on ???
JOHN JOYCE: Backing vocals on ???
STAN FARBER: Backing vocals on ???
JIM HAAS: Backing vocals on ???
*** - I'm only guessing he sang on "The Show Must Go On" because those vocals reminds me of the Beach Boys.

Other questions about the studio album:
1. At the end of "The Happiest Days of Our Lives," there's some additional percussion going on aside from Nick's drumming. Who does that? Or was it an overdubbed Nick?
2. Does Rick Wright play the piano on tracks like 'The Thin Ice,' 'Don't Leave Me Now' and 'Nobody Home?' Gilmour has said that Bob Ezrin and Michael Kamen would "play a few keys if Rick wasn't around."
3. Did Nick do that strange percussion sound on 'Empty Spaces'?

IS THERE ANYBODY OUT THERE?:
The extra personell is listed as: Snowy White/Andy Roberts (guitars), Andy Brown (bass), Willie Wilson (drums), and Peter Woods (keyboards).
My question is: Was this the "Surrogate band" that would perform "In the Flesh" wearing rubber Pink Floyd masks? Also, what other roles did they play in the live shows? (other than the obvious fact that someone else played bass for Roger when he would play his various character roles? (i.e. the doctor on CN, etc.)?

1. Is that Rick on that lovely keyboard transition from "Goodbye Blue Sky" to "Empty Spaces?" Also, was it Rick who played piano live on Nobody Home and stuff like that? And did he play the keyboards heard on the live version of "Another Brick Part ONE" (which sounded different from the studio version).

Thanks, if I have any other questions I'll let you know.

To get that really low, growling Hammond noise, you need to press a lot of keys at once in the low register. In a fast-moving, high-energy track like ITF, this requires the use of the keyboardist's elbows. Apparently Rick couldn't or wouldn't reduce himself to such uncouth keyboardal gymnastics.

And although I've read that Freddie Mandell plays Hammond organ on "most tracks," meaning the majority of the album, it's also been reported that Peter Wood is the man behind the organ on "In The Flesh?" More confusing still is the assertion that "Rick played some great Hammond" as well. No specifics given, unfortunately.

Lee Ritenour plays rhythm guitar on "In The Flesh?", "Mother", "One Of My Turns" and "Comfortably Numb" but it is Willie Wilson who plays the acoustic guitar on "Is There Anybody Out There?"

This raises questions around exactly who is playing what on "In the Flesh" (both versions). Jeff Porcaro (who also plays on Mother) is reportedly playing drums on "In The Flesh?" (the first one), but is he alone or alongside Nick? Does he play on the second version too? What exactly is Lee Ritenour playing, and what is Dave Gilmour playing (if anything)? Does Peter Wood, or Freddie Mandel take Rick's place? For what parts?

All of them are indeed singing on "The Show Must Go On", as well as "Waiting For the Worms", "Run Like Hell" and "In the Flesh".

Not sure about these, but the "Empty Spaces" percussion seems to be a synthesized or heavily processed loop and not real drumming.

For "In the Flesh?" they would indeed wear the rubber life masks and pretend to be Pink Floyd. The "surrogate band" would then join the real Pink Floyd for the rest of the show, fattening up Nick's drums with extra percussion, playing rhythm guitar behind Dave's lead (Snowy even takes a solo after Dave on "Another Brick, Part Two"), and playing extra keyboard parts.

I think Andy Bown (not Brown) played most of the bass guitar during the show, but for a few numbers he plays alongside Roger (to see how this works, watch Andy Fearweather-Low play bass during "Time" on Roger's live DVD: they'll trade off back and forth). Mr. Bown is also credited with playing Hammond organ and acoustic guitar on Roger's solo album The Pros and Cons of Hitchhiking, so maybe he played some of that during the shows as well.

I think so. Not really sure about how much Peter Woods was responsible for, but whenever you hear elbows on the Hammond then I guess that's him.

And here I thought it was an 'uncredited session musician'.

Uncredited, yes. Unknown, no.

Makes sense.

Very interesting reading.

I assume the rubber masks on the front of ITAOT are the masks the surrogate band wore?

Yup. They're also hidden in the Echoes cover (beside one of the windows).

You mean Dave and Co. played with Rog on In The Flesh the song...tour?

I'm lost

It's okay. It's a very confusing topic.

During the 1980-81 wall shows, the first number, "In the Flesh?" was played by a band (referred to as The Surrogate Band by many people) which was comprised of Snowy White/Andy Roberts (guitar), Andy Bown (bass), Willie Wilson, and Peter Woods (keyboard).

They pretended to be Pink Floyd, wearing rubber masks of the real members' faces. Then the lights came up on the REAL Pink Floyd, behind them. After that, everybody played as one big happy family.

Well, more like one big disgruntled family at a bad Thanksgiving family dinner, but yeah

Hmm... well I guess Rick must have spilled cranberry sauce all over his Hammond and made the keyboard sticky then, because he's got his elbows all over the piano during ASOS at Pompeii!

This ain't Pompeii, it's The Wall...the happy family was not a happy family anymore, was what I was saying.

Yes... hence no cranberry sauce at Pompeii, hence no sticky keyboards, hence elbows on the piano.

And cranberry sauce on Hammond during the Wall sessions = no elbows.

Simple.

Maybe he couldn't reach the top keyboard on the Hammond with his elbow, which makes sense, other than the fact that both keyboards on a B-3 are identical and he could have done the part on the bottom one.

Ahhhh I get what you're saying now. My mistake.
-Dan Rather, CBS News.
I mean

-Jawbone.