Roland’s TR-909 is a synthesizer classic, and one of the driving sounds in the current electronic and techno genres. Propellerhead’s 1996 Rebirth software models two Roland TB-303 synthesizers, a TR-808, and a TR-909 all at once, and was released on iPad in 2010. For the next 9 days it is on sale for $9 to celebrate 909 day!
Here is Mumbance showing off some of the amazing power of the TR-909
http://www.youtube.com/watch?feature=player_embedded&v=XCxiPKrdXkI