Conversation so far:
What kind of instrumentation did they use?
A piano chord, replayed backwards, serves to augment the build-up of effects.
Were there any particular songs they used this technique on?
are immediately followed by the opening of "Breathe.
Were there any other songs that used the technique?
CANNOTANSWER.

Question: What other different techniques did they use?
Self-contained rewrite: Aside from piano chords replayed backwards, What other different techniques were used on The Dark Side of the Moon??