When comparing Audio Hijack vs Audacity, the Slant community recommends Audacity for most people. In the question“What are the best audio recorders for Mac OS X?” Audacity is ranked 2nd while Audio Hijack is ranked 3rd. The most important reason people chose Audacity is:
Audacity is available for free on Windows, Mac OS, and Linux with source code available [here](http://audacityteam.org/download/source).
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Isolates the audio stream
And you can fine tune the download similar to when using the old reel to reel recorders.
Pro Has realtime effects
Audio Hijack has some Audio Unit (AU) effects built in.
Pro Free, open source and cross-platform
Audacity is available for free on Windows, Mac OS, and Linux with source code available here.
Pro Well maintained
Audacity is constantly updated.
Pro Great community backing it
Pro Great for vocal track editing
Cons
Con Not seen as a full DAW
Audacity doesn't have the capabilities of popular DAWs and generally isn't considered to be good option.
Con Doesn't retain audio integrity
Audacity uses destructive editing, meaning applying effects, cutting, etc is non-reversable after you've saved a project.
Con No real time effects
Users are unable to change effects in real time with Audacity. If effects are to be changed, no sound can be playing or recording.
Con Unable to use Synthesizers / virtual instruments
You can only use effect plugins or record live with this DAW.
Con No native 64-bit version, therefore does not support 64-bit VST plugins
Audacity is available only as a 32-bit application, therefore even when running on 64-bit machines, it only supports 32-bit VST plugins unless they are converted to 32-bit using an application such as JBridge.