The AE is a great tool for freeing up your audio. And if you use Airfoil, you can stream any app to it. Basically turning your mac into a wireless preamp. I connect my USB turntable and my hd radio digital out to the mac and stream it to my AE with Airfoil. I've got a nuforce icon in my little budget listening room to handle dac and amp duties. It's a pretty solid setup and very cost effective. <br />
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I'd love to see some tests on Airfoil to see how transparent it is, and an article on the better apps to capture digital audio sources. I use Audio Hijack pro now. <br />
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And Airfoil + Songbird finally gives us a true alternative to iTunes.