About Archibald
Archibald is a complete and powerful tool for creating grooves. Thanks to its flexible step-sequencer, you may edit drum parts of virtually any level of complexity.

Archibald is then able to add its own realistic interpretations of your patterns, putting a ‘human’ touch to note, velocity, and attack information, according to your own taste. Archibald comes with its 260 mo sounds’ bank, and may be extended with any third party sound. It includes a flexible and amazing patterns’ creator and a live module. Archibald is ReWire compatible.

Read more: http://www.apple.com/downloads/macosx/audio/archibald.html