Send audio output of MacBook to iPhone for remote listening Is it possible to send audio from music in iTunes, or from movies on Netflix, or video game sounds, etc., from my MacBook and receive and listen to the audio on my iPhone? I'm thinking of this working like wireless headphones, except with a really long cord. If there is a way could you let me know how the solution works, I'm interested in creating my own script/app to do this if it's not too daunting.

If its important, I'm running an old 2009 MacBook, running Snow Leopard.
Yes, using Airfoil for Mac (also available for Windows) and the companion app Airfoil Speakers Touch you can stream any audio from your Mac to your iOS device. 

I haven't tried it much myself, and reviews are mixed, but you can try it for free before shelling out the money for it.

This can also be used to send audio from a MacBook to a bluetooth headset connected to an iOS device. Something which is very difficult otherwise.