AudioUtil features tools for capturing and analyzing audio signals from your devices microphone in real-time. Screenshots of the display can easily be taken through the utility's context menu. Touch the graph to show a value readout. Adjust multiple parameters like sample rate, buffer size, zero padding, window type, range, and themes to name a few.

Utility Descriptions:

Oscilloscope
• View sound waves in the time domain.
• Amplitude measurement by dragging on the screen.
• Set trigger level to freeze display if audio exceeds amplitude threshold.
• Displays time and amplitude in readout.

Meter
• Amplitude readout with variable time falloff.

FFT
• Linear and logged frequency axis.
• Peak tracking for up to five peaks.
• Displays frequency and amplitude in readout.

Spectrogram
• Definable frequency limits to zoom in on desired frequencies.
• Four themes/color maps.
• Displays time, frequency, and amplitude in readout.

Spectrum
• View a FFT analysis as a color spectrum.
• Four themes/color maps.
• Displays frequency and amplitude in readout.

About permissions: This app requests minimal permissions to record audio and to write to storage. These are required in order to successfully capture sound and save screenshots to the device.