Rogue Amoeba’s Loopback for Mac OS X is a tool for enabling audio routing between applications and audio devices on your Mac. In just a few clicks, you can easily pass audio directly between apps.

You'll buy Loopback for one job, and then keep finding more uses for this sound routing app for your Mac. There are reasons why musicians choose Macs instead of PCs and Loopback 1.1.5 is one of them.

Mac: If you need to route audio from one Mac to another, say, from a microphone to Skype to Audacity, the go-to tool has long been the often baffling, occasionally unreliable Soundflower. Loopback is ...