StackStore

Soundwave ​

Soundwave turns an Android phone's microphone into a real-time oscilloscope and FFT spectrum analyzer. It shows how a sound changes over time and how its energy is distributed across frequencies. Core tools are free; paid Premium features extend the analysis controls.

Platform and uses ​

  • Platform: Android.
  • Input: sound captured through the phone's microphone.
  • Uses: studying waveforms, exploring harmonics, and inspecting audio signals in acoustics learning or audio work.
  • Availability: Google Play, with in-app purchases for Premium features.

Main features ​

  • A time-domain oscilloscope with zoom, pan, and two markers for comparing time and amplitude differences.
  • Rising- and falling-edge triggering, with automatic, normal, and single-run modes to stabilize or freeze waveforms.
  • An FFT spectrum analyzer with linear or logarithmic frequency axes, peak finding, and peak navigation.
  • A scrolling spectrogram that shows changes in the spectrum over time.
  • A multi-tone signal generator with audible output and a silent simulated mode.
  • Real-time frequency, period, Vpp, Vrms, and dBFS readouts.
  • Screen snapshots that can be shared as PNG images or saved to the photo gallery.

Premium unlocks additional controls, including unlimited signal-generator frequencies, FFT window choices, resolution-bandwidth readout, spectrum reference level, spectrum peak hold, and more waterfall themes. Consult the store listing for the current feature split.

Get started ​

Download Soundwave on Google Play.

The official listing describes the available instruments and current Premium features. Microphone input is the source for real-time sound analysis.

FAQ ​

Is Soundwave entirely paid? ​

No. Core tools are free, while Premium unlocks additional analysis and customization features through an in-app purchase.

Does it show both waveforms and frequency content? ​

Yes. The oscilloscope shows the time-domain waveform; the FFT spectrum analyzer shows frequency content. The spectrogram adds a view of how that spectrum changes over time.

Can it generate a signal as well as analyze one? ​

Yes. The built-in multi-tone signal generator supports audible output and a silent simulated mode.