Apps in this category may contain mild or occasional cartoon, fantasy or real-life violence, as well as occasional or mild adult, sexually suggestive or horrifying content and may not be suitable for children under 9 years of age.

12+

Apps in this category may contain occasional mild indecent language, frequent or intense cartoon or real-life violence, minor or occasional adult or sexually suggestive material, and simulated gambling, and may be for children under 12 years of age.

17+

You must be at least 17 years old to access this App.

Apps in this category may contain frequent and intense offensive language; Frequent and intense cartoon, fantasy or realistic violence: frequent and intense adult, scary and sexually suggestive subjects: as well as sexual content, nudity, tobacco, alcohol and drugs, may not be suitable for children under 17 years of age.

Audio Analyzer Screenshots

iPad

iPhone

About Audio Analyzer

The analyzed result of the waveform is rendered at 60FPS. The following 4 functions can be accessed:

Waveform visualizer (oscilloscope)
Spectrum analyzer
Historical peak
Historical FFT

Tapping each function enters into full-screen mode and tapping once more exits full-screen mode.

Horizontal zoom is only available for the spectrum analyzer. Magnification gesture (aka pinching) allows for zooming in and out, and frequency offset can be performed by swiping on the screen horizontally.

Vertical swiping adjusts input volume. Coefficients are displayed in the corner.

 *dBFullScale 20 * log10 ( input)

A demonstration is here.
https://www.youtube.com/watch?v=6mDa_zCgYzE