I noticed two nice changes to some audio playback buttons in iOS 6. First, if you’re listening to a podcast or an audio book and the display goes to sleep, double-tap the Home button to bring up basic audio controls right on the lock screen. That’s not new, but what is new are the buttons that let you jump ahead or back 15 seconds at a time.
Likewise, you can double-tap the Home button while the display is active to reveal the list of running apps. Scroll to the far right to find the audio playback controls. Again, they aren’t unique to iOS 6, but the 15-second jump buttons — back and ahead — are. Neat.