From Sonoran Blue:
Tapstereo is sound oscillator. You can select range of frequencies. This application has four modes. 1. Fall - It generates sound of frequency where you touch, then it drops until silent. 2. Stay - It generates sound of frequency where you touch. 3. Rebound - You can spin the ball around by swipe. 4. Roll - Location of the 'sound ball' is controlled with using device's motion sensor.
New version of Tapstereo has 3 screens. The first screen is same of original version (1.0). The second screen is enhanced sound playback. Number of 'sound ball' is up to four with 4 kinds of sound generators and 3 types of effects. The third screen is keyboard. If you are using iPhone, you can also play recorded voice here. (iPod touch can play preset samples only, no recording)