Could be anything. There are dozens of drum libraries capable of that sound. With enough time and effort, I could duplicate it with the TTS-1 (but wouldn't really want to). Addictive Drums, BFD, Superior Drummer or Steven Slate Drums are all popular options. There are also many Kontakt-based drum libraries which, aside from the cost of Kontakt itself, are very inexpensive. Pick one and go with it. They'll all work once you've gotten comfortable with them.