Playback Speed Increase?

[nipolit]

i have a lot of audio files i'd like to listen to at faster rates; i.e., slow talking seminar dudes i'd like rip through quickly at 2x, 4x, or even 10x speed.

is there a feature or plugin to accomodate this feature? i browsed the forums for half an hour but couldn't find anything about this -- sorry in advance if the answer already exists!