AudioMulch 2.2 hasn't been released yet, but it is ready for beta testing.
If you'd like to help test it, please contact firstname.lastname@example.org and we'll give you access. You can read more about the current state of AudioMulch development in this forum post and on the "What’s Coming?" page. [UPDATE: we're no longer accepting new beta testers for version 2.2. The final version will be released soon.]