What it can do:

• Export 32-/64-bit standalone VST/AU plug-ins for Mac OS X.
• Export 32-bit standalone VST plug-ins for Windows.
• Feedback loops are now sample based (which means recursive filters can now be implemented directly in SonicBirth, see lowpass).
• You can save small circuits in ~/Documents/SonicBirth/Circuits/, and they'll appear in the module list like other modules, upon relaunch (please share those).

What it can't do:

• No document management: it will happily discard any unsaved modifications if you create or open a new document.
• No undo/redo.
• No MIDI support.
• No custom GUI.
• A lot of modules and features are missing.

SonicBirth is an AudioUnit designing application. The first in its category, it allows users to build their own AudioUnit plugins, either by working with existing circuits or by creating circuits completely from scratch. SonicBirth is also a free AudioUnits package, as it comes bundled with a set of plugins designed for standalone use as plugins as well as pre-constructed circuits to modify or build upon for creating new plugins. Whether you're looking for traditional eqs, compressors, and reverbs, or softsynths, distortion, and filters, etc., SonicBirth allows you unprecedented freedom and creativity over your sound.

SonicBirth is based on a powerful, flexible engine. Every plugin can be used in 32 bits or 64 bits for added precision. Since all plugins share this engine, any improvement in speed will benefit all of them.

SonicBirth is now completly free (open source). Version 1.3.0 is not, however, compatible with plugins created by older versions.

Visit: sonicbirth.sourceforge.net