Static Z Software released Sound Siphon on Tuesday, an app that captures sound from any other Mac app and allows you to record it. The app relies on a CoreAudio plugin that allows the app to work in compliance with Apple's Sandboxing rules for OS X and Mountain Lion for apps sold outside the Mac App Store. That means you can record the audio from, say, Safari, iTunes, or even a game. Sound Siphon offers a free version that allows you to record all of your system audio at one time. Registration for US$29.99 allows you to target individual apps, adjust their sound levels, and other controls. The video below demonstrates how it works.
Check It Out: Sound Siphon Records Sound from Other Mac Apps