听力 App, Anyone?

Every day I use iTunes to listen to ChinesePod podcasts, my textbook CDS, storybook CDS, etc. 

I've noticed how ANNOYING it is to scroll back 5s, 10s, etc. 

Anyone know a great MP3 app (for MAC) that allows very easy manipulation of song playback? Something perhaps designed for students wanting to practice a language?

Thanks!