Here is an upcoming App Store application called Noise.io. It is an sound synthesizer for the iPhone and iPod Touch. It looks very promising and seems to work very well! Read more for a video of a beta test and some more information.

Noise.io is planned to be in the App Store by the 25th of August, and will cost only $6.99. For even more information, you can go to Noise.io’s homepage here.