Audio Hijack

Rogue Amoeba’s awesome software for Mac lets you select another program on the same computer and rip audio straight from it. If you’re the kind of producer who likes using foley recordings and real-world sounds – or a budding fan of government mass surveillance programs – you can use Audio Hijack to capture from things like Skype, Chrome (a good back door to YouTube and Spotify), your system audio, and attached mics, audio interfaces, and so on.