Reverse echo

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Reverse echo or reverb is a slightly unusual sound effect created as the result of recording an echo or delayed signal of an audio recording whilst being played backwards. The original recording is then played forwards accompanied by the recording of the echo or delayed signal which is now in reverse.

The effect is also commonly used in film, often on the vocal recordings especially in Horror movies. The swelling effect is often used to create tension and intensity, but can also be used for more subtle atmospheric effect.

Guitarist Jimmy Page lays claim to the invention of this effect and used it in the bridge of the Led Zeppelin song "Whole Lotta Love".

[edit] Other songs utilising this effect

Also widely used by Kevin Shields In My Bloody Valentine