Signal Generator: Audio Test Tone Utility for iOS

Audio Signal Generator is a powerful app designed for iPhone that allows users to generate various audio test tones. This utility falls under the category of Utilities & Tools and is available for free. The basic version includes a sine wave generator, capable of producing signals ranging from 20 Hz to 20 kHz, with a sample rate of 48 kHz and 16-bit samples. With a wide dynamic range of 96 dB, users can precisely control the frequency using a logarithmic knob or keyboard input.

For advanced users, the Pro Tone Generator offers additional features through an optional in-app purchase. It extends the frequency range down to 1 Hz, adds stereo control, and provides buttons to increment the frequency in steps. The app also includes a Noise Generator for generating white, pink, and brown noise, as well as Frequency Sweeps for adjustable sine wave frequency sweeps, making it a versatile tool for testing speakers, balancing audio systems, and tuning instruments.