I think the Saucerful of Secrets(studio), Ummagumma (live) and Live at Pompeii versions are the only official releases. There are obviously many bootlegs of other live performances.

I don't remember any with a 'dynamic' ending. I think it just fades out.

I'm no expert on it, however.

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Taking away from you for the greater good. (The Audacity of Socialism).

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