My MacBook lineout jack became faulty and then stopped working a couple years ago, and I was past warranty. I bought a USB device that I can plug my headphones into, but I lose it a lot. I'm now in the airport getting ready to go overseas for three months, and just realized I left my USB device in my car, which is gone now... I have an iPod however. Can I somehow route the audio in my laptop through my iPod, as it's plugged into my MacBook? Surely there's an app for that!