Audio Visualizer: Inspect Waveforms and Spectrum
Select an audio file up to 25 MB, choose waveform or FFT and start. Use the audio player's controls to pause or seek. Processing and playback stay in your browser. Stop closes playback and the audio context.
Results
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How to use this tool
Select an audio file up to 25 MB, choose waveform or FFT and start. Use the audio player's controls to pause or seek. Processing and playback stay in your browser. Stop closes playback and the audio context.
| Results | Method and units |
|---|---|
| Frequency | FFT, N = 2,048 |
| RMS | √(Σ sample² / N) |
| dBFS | 20 × log₁₀(RMS) |
| Sample rate | AudioContext.sampleRate, Hz |
Example
Audio file: example.wav · RMS: 0.1 · dBFS: −20 · Sample rate: 48000 Hz
What this test can and cannot tell you
Results reflect events and signals available to your browser. Settings, permissions and device support can affect them; they do not certify that hardware is healthy or faulty.
Microphone dBFS is a digital signal level, not room dB SPL