Spacey Theremin Instruments app. Touch&move screen, will change pitch. Pro version is no ad and You can use with no limit additional tools in the future. Multi-touch free2 pro10. View menu by Shake. At menu-setting. Delay. On/Off. Time. Feedback. Wave. Sine. Saw. Square. Triangle. Noise. Warp On/Off. Softness. Volume. Features will be added: Control by sensor like rjdj.