This walkthrough from Mastering.com opens up Ultra Beat's modeling oscillator, the same physical-modeling engine found in Sculpture, now built into Logic's drum machine.
Material, stiffness, and inner loss controls let you shape the physical character of a hit, while two exciter types and the pitch and resolution parameters push the sound in different directions.
Moving around the material XY pad produces plucks, wooden mallet tones, muted bell hits, a metallic bit-crushed texture, and a full bell sound, all from one oscillator.
It's a fast way to design custom drum hits without loading samples, useful when a kit needs a tone that stock drum sounds can't quite deliver.