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Audio Spectrum Analyzer

A handy real-time audio spectrum and spectrogram analyzer
New in version 2.7
New options for peak hold
Audio Spectrum Analyzer was designed with accuracy and ease of use in mind. It can be used for monitoring or measuring environmental sound or noise; help tuning instruments; timing short sound events; and educational purpose.


Features:

* No Ads.
* With log or linear frequency axis.
* Can label frequency axis using music pitch note.
* Support all possible sampling rates and almost all recorder sources of your device.
* Graph with nice grid lines and labels, easy to operate.
* FFT sample size range from 64 to 32768. Using half-overlapped (adjustable) time window to increase time resolution.
* Various window functions provided, for different frequency resolution and dynamical range.
* Peak frequency detection (in unit of Hz and note+cent), with a moderate accuracy (FFT + interpolation).
* With dB or A-weighting dB (dBA).
* Can record the audio in wav (PCM) format.
* Pinch to zoom, drag or swipe to move, long-press to place cursor, double touch to reset zoom.

Notes: May need some knowledge of discrete Fourier transform and spectrum analysis to use it well. The actual accuracy mainly depends on your device. No calibration interface provided.
  • app screenshot
  • app screenshot

Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid
  • Version 2.7 (270) suggested Added on Oct 05, 2024

    This version requires Android 4.0 or newer.

    It is built by F-Droid and guaranteed to correspond to this source tarball.

    Permissions
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.
    • record audio
      This app can record audio using the microphone while the app is in use.
    • control vibration
      Allows the app to control the vibrator.
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
    • org.woheller69.audio_analyzer_for_android.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 1.6 MiB PGP Signature | Build Log

  • Version 2.6 (260) - Added on May 30, 2024

    This version requires Android 4.0 or newer.

    It is built by F-Droid and guaranteed to correspond to this source tarball.

    Permissions
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.
    • record audio
      This app can record audio using the microphone while the app is in use.
    • control vibration
      Allows the app to control the vibrator.
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
    • org.woheller69.audio_analyzer_for_android.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 1.6 MiB PGP Signature | Build Log

  • Version 2.5 (250) - Added on Oct 04, 2023

    This version requires Android 4.0 or newer.

    It is built by F-Droid and guaranteed to correspond to this source tarball.

    Permissions
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.
    • record audio
      This app can record audio using the microphone while the app is in use.
    • control vibration
      Allows the app to control the vibrator.
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
    • org.woheller69.audio_analyzer_for_android.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 1.6 MiB PGP Signature | Build Log