AudioTool 8.4 Apk + Mod for Android

AudioTool 8.4 Apk + Mod for Android 1
Overview Information
Name AudioTool
Package com.julian.apps.AudioTool
Version 8.4
Size 2
Requires Android 2.3.3



SPL (deciBel) Meter featuring RT60, Leq, Sone, Spectrum Analyzer, Spectrogram, Chart Recorder, Signal Generator, Polarity Checker, and Mic calibration.

Recommended by “Sound and Vision” magazine. Loved by Audio Engineers worldwide: check out the Reviews!


To hide the buttons, tap the screen. To restore them, tap again. To zoom the scale, pinch the screen. To move the scale, drag it up or down (left or right).

A pair of cursors can be shown: each can be moved to any position, and will display the SPL & time/frequency values there. The cursors can be turned on and off in the Menu.

The loudspeaker polarity checker can be used to check whether a loudspeaker is wired in phase: connect the AudioTool output to the speaker under test, select “Polarity” from the signal generator screen, then return to the RTA screen. If the speaker is out of phase (polarity reversed) AudioTool will show “Pol —“, otherwise “Pol +++” if the speaker is in phase.

The Noise Criteria function shows a set of NC contours overlaid on the 1/1 Octave RTA display and the calculated real time current NC value is also shown.

The Chart Recorder shows a moving trace of the SPL measurements over the last few minutes.

RT60 measurements (how much reverberation or echo there is in a room or hall) can be made using the “RT60” function, triggered using a loud clap (or similar) to or with Pink Noise from the AudioTool generator.

The Signal Generator generates White and Pink Noise, Sine, Square, Triangle and Ramp waves, Sine Linear and Log Sweeps, Warbles and Impulses. The generator uses multiple cycled buffers, refreshed randomly so ensuring truly random White and Pink noise.

The frequency accuracy of the Signal Generator is typically around 1%. Sine wave fidelity is good throughout most of the audio range. Other signals’ leading and trailing edges will show ringing and decreasing frequency response artifacts in the upper ranges, depending on the cellphone being used.

Download AudioTool Mod APK

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What’s new

  1. Cursors now show two decimal places of frequency accuracy above 1kHz.
  2. Current (latest loaded) Calibration file name always shown in Mic display
  3. Improved suppression of clicks in Generator Sweeps
  4. Second loaded spectrum colour is now Magenta (was Red)
  5. Fixed bug where rotating phone during Sweep, Log Sweep, Warble caused generator to stop
  6. Minimum frequency step for “<” “>” buttons in generator now set to sampleRate/sampleLength
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