Static Z Software has released Sound Siphon, a tool for capturing application audio on your Mac. It requires Mac OS X 10.9 Mavericks and costs US$29.99.

Sound Siphon is a software package that makes your Mac’s audio output available as an audio input device. It enables you to send audio from one application to another where it can be processed, streamed, or recorded. Using it simply involves selecting a microphone in your favorite app. Sound Siphon works with Core Audio to provide this capability to all of your audio apps.

Sound Siphon is available from the Static Z Software website (http://staticz.com). You can also download a demo there.