Audio effects are a blast to create, but it's not easy to find an affordable equivalent of a Swiss Army knife for doing just that. SFX Machine Pro is a one-stop shop for audio processing at a reasonable price - and it makes sweet sounds.

The app works flawlessly as a plug-in for GarageBand and Ableton Live, with exceptional processing efficiency. Putting SFX Machine Pro to work is a snap - what the interface lacks in looks, it makes up for in intuitiveness. The 300 presets are divided into categories; click a category, and the variations are presented in an adjacent Preset column. When you choose one, the sliders display the controls, which vary for each preset. The controls open up endless possibilities, and what's more, you can save your own custom presets.

REQUIREMENTS: Mac OS 10.3.9 or later

To download a demo copy of SFX Machine Pro 1.1.1 (3.3MB), click here.