So I take the train now to and from work and on the way back I want to pass out but I don't want to miss my stop, so I set my alarm to wake me up but the alarm also goes off on the iPod itself and I'm sure it's annoying to other passengers. Is there a way that the sound from the alarm only goes off in your headphones? I always have mine on listening to music. I couldn't find a setting. Is this possible? Thanks.