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Recent software advances have changed the way interpreters look at and work with pre-stack data. Not only are they now able to store multiple versions of the post-stack data, but they can also view and process pre-stack data too. Such a change in emphasis in the interpreter’s influence must impact the way gather processing is performed. Careful gather conditioning techniques can provide data optimised for different interpretation tasks, such as AVO analysis, fault resolution or tying to wells.<br>