HandSynth (App Store link) is a $5.99 performance synthesizer with a simple interface and several complex oscillators and filters. Features: A multitouch keyboard gives great control on the sound, not achievable with classic synths, while a “Theremin” mode adds realtime modulation possibilities. Thirty oscillator modes, from classical shapes to frequency modulation and more. Includes lowpass… Read More HandSynth ‘Performance Synthesizer’ for iOS