Pocket Organ C3B3 is an app that simulates a Hammond organ. The sound is generated by synthesising waveforms from a “Virtual Tonewheel System” controlled by 9 drawbars like the real Hammond organ. The Pocket Organ has a rotary speaker effect like the Leslie speaker, for character and spatial depth. It can be set to Fast (Tremelo), Slow (Chorale) or off (brakes). It has built-in reverb, harmonic percussion, and five-octave dual keyboards with switchable key. It also has a key transpose function. Pocket Organ is programmed by Shinya Kasatani, the creator of best selling iPhone App “PocketGuitar” and is designed by Junichiro Yamasaki of “Manetron (Mellotron App)”.