I read about this from http://www.fasteraudio.com/speedlistening/
You don't need to buy their software though. You can just use Windows Media Player and alter the settings by right-clicking on the Now Playing Window, selecting Enhancements and the Play Speed settings.
Apparently the human brain can process 600 wpm while the average person talks 125-150 wpm. Currently I'm at 110% (taking it slow
). Most of the stuff I listen to (talk shows, podcasts, my audio bible and rap music) has a high wpm to begin with.
Just imagine! Now you can listen to Alex Jones, Trunews, Webster Tarpley, Alan Watt, your daily podcasts, Bible, favorite music, new mixtapes, etc. at potentially, 1/4 the time!
Or consume 4x as much!