If used for lecture play-back...

This app does what it says it will and it does it effectively. That said, I downloaded this to speed up the play-back of my biochem lectures so I wouldn’t have to sit for an entire hour to re-listen to an entire lecture. However, anything faster than 1.75x is choppy and 2x+ is nearly indistinguishable/inaduible. Again, it works perfectly and effectively but just know that there are limits to its power. I really like that the pictch of the professor doesn’t change with speed increase or decrease (I was worried about havign to listen to Alvin and the Chipmunks at increased speeds). I have also played with my music using this app and have been pleasantly amused with the results… of course the humor I find in messing with my music could be the 2am studying binge speaking...

Tasera about Speed-Up for iTunes