【實用音樂app】Fourier Touch|最夯免費app-綠色工廠好玩App

***If this app produces no sound, please let me know your device and iOS version. Best regards.***Play sound by multi-touch!Max 5 (or 8, iPad) harmonics by multi-touch. Base frequency, pitch, and volume can be selected continuously. Types of signals are five (sine, spud square, square, sawtooth, and triangle). You can see the waveform, and learn the relation between tone and waveform.How to useBase frequency: touch, tilt (switched by double tap)Volume: touch, tilt (switched by double tap )Harmonics: multi-touchRange: shakeSignal type: double tap