IR-909 is a drum machine for the iPhone inspired by the Roland TR-909. IR-909 features a 16-step sequencer, 4 patterns and 8 different drum sounds. IR-909 includes individual pitch, attack and length controls for each sample. By default IR-909 comes with 6 different sample packs, these include the original TR-909 pack, TR-808, TR-707 and TR-606 packs, plus two additional ones called "Tech House" and "Krv". To change the amount of, e.g. the tempo, press and hold on the tempo button while you tilt your iPhone/iPod.