Signal Generator: Audio Test Tone Utility!

Signal Generator is an app that produces audio test tones. The basic app produces sine waves, and it can be extended and customized (via in-app purchases) to produce white noise, pink noise, frequency sweeps, and (on iPhone 4 and better) square waves, sawtooth waves, and triangle waves. This app can be used to: Test Speakers and Headphones Balance your Home Theater System Tune Your Car Audio System Mask Environmental Noise Burn In Headphones Tune Musical Instruments