I mentioned here that users often ask us how to record system audio when making a Jing video. The answer for Mac users is a little easier, but comes with the same caveat as the Windows version: you can only record one thing at a time (voice narration or system audio).
That said, using SoundFlower from developer Cycling ’74 is a great way to route audio on the Mac. Soundflower creates an internal input and output channel; you can tell your system that you want your audio pointed at the internal output and your recording pointed at the Soundflower input. This creates a software loop inside your machine that points your system audio right to your recorder. This means that programs like Jing (which records the default system input) records your system audio.
The downside to this is that while your system audio is rerouted with Soundflower, you can’t hear it from your speakers or headphones. That’s where Soundflowerbed comes in. It pulls off some trickery and allows you to hear what Jing is recording.
Here’s how you do it.
First things first, install SoundFlower. You need administrator access to your machine to do this. It requires a restart as well.
Once that’s done, click on the Apple menu and select System Preferences>Sound. On the Input and Output tabs, select Soundflower (2ch) as your input and output channel, respectively. Launch Soundflowerbed and from the icon on the Menubar select Built-in Output.
That’s it; Jing is now setup to record audio from your system. To record voice narration, just go back and switch the input back to your microphone.
Here’s a Jing (0:36) of the process. The video picks up right after I’ve installed SoundFlower and resarted my computer. Remember you can only record one input. Therefore there’s some nice music in the background of this video, but I wasn’t able to use my microphone to speak to you.