David Gilmour:
«There was another guy, whose name escapes me, who played the Spanish classical guitar part on "Is There Anybody Out There?" because I felt I couldn't do it quite cleanly enough or well enough for the record. Onstage, of course, I ended up doing it, and it wasn't a problem. I can't quite remember how we came across Snowy White. He was a great guitar player, but I honestly can't remember who recommended him, or why, or when. I don't think at that time I was too used to hiring other musicians, so I can't remember how we went about it. Since then, I've started noticing other musicians with an eye to using them, from the point of view of who I might use in the future. I've been keeping a little book on musicians of all sorts who I thought were interesting, not just guitar players»
«David Gilmour - The guitar interview», Guitar, September 1995
Joe Di Blasi (guitarist): «So I got called by Frank DiCaro, who knew (…) that I played classical or fingerstyle. And I got the call because David Gilmour, they had tried to play something with a felt pick. He didn't play fingerstyle at all. So I got the call and I showed up at the studio and they didn't have anything written. (The song was) Is there anybody out there?»
Interviewer: «Was there anything recorded or were you the first thing on tape?»
Joe Di Blasi: «No, I was the only thing»
Interviewer: «Yeah, because that's all you»
Joe Di Blasi: «Well, yeah. And then they added everything else after the fact (…) Bob Ezrin had come up with the three note... You know, it's... Almost James Bond. I mean, E, F, F sharp, back to F, back to E.
So he came... He had come up with that, that three note pattern. And that's all they had.. So he and David Gilmour and I sat down in the booth and they kind of told me what they were looking for. So I'd play something else. And we constructed the whole thing that way. Then I went in and recorded it (…) We did about 10 takes. Bob Ezrin is an amazing producer and he had a specific performance that he wanted. He was looking for something that just... He wanted a specific performance. And, you know, I probably... One of the first... Two or three takes would have been my choice. But he wanted more. And finally, maybe after about 10 takes, he goes, that's the one. So it was the 10th one. David Gilmour is the nicest guy you'd ever want to meet. He was so nice. And Roger Waters, who took the writing credit for what I did, wasn't even there. So he may have had something to do with the three-note phrase, you know, the E-F-F-sharp or James Bond kind of thing. But he took the writing credit for it and then learned it note for note and put out a video of himself saying that»
«Joe DiBlasi and his Contribution to Pink Floyd's The Wall», Pro guitar secrets YouTube channel, 6 February 2023
Roger Waters:
« « Is There Anybody Out There ? » is really just a mood piece »
«The Friday Rock Show- interview by Tommy Vance», Capital Radio, 30 November 1979