Real-time audio frequency spectrum analyzer and visualizer. View frequency bars, waveform, and spectral display. Supports microphone input and file playback with multiple color themes.
See what your audio looks like in the frequency domain. Upload a file or use your microphone and watch a real-time spectrum analyzer, spectrogram, or waveform display. The visualizer breaks the audio signal into its component frequencies so you can identify dominant pitches, spot noise, and understand the tonal characteristics of any sound.
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Generate beautiful waveform visualizations from audio files. Choose from bars, mirror, line, or circular styles. Customize colors and export as PNG.
Generate pure audio tones with sine, square, sawtooth, and triangle waveforms. Create multiple oscillators, binaural beats, and export as WAV.
Detect the tempo (BPM) of any audio file. Includes tap tempo feature and genre reference guide.
You suspect a recording has a constant electrical hum and want to confirm and locate it.
Input
recording.wav · real-time FFT spectrum
Result
A sharp persistent spike at ~50 Hz → mains hum confirmed
An FFT shows energy per frequency, so a narrow constant spike at 50/60 Hz is unmistakable mains interference rather than something you guess at. Seeing the exact frequency tells you precisely what to notch out.
See what your audio looks like in the frequency domain. Upload a file or use your microphone and watch a real-time spectrum analyzer, spectrogram, or waveform display. The visualizer breaks the audio signal into its component frequencies so you can identify dominant pitches, spot noise, and understand the tonal characteristics of any sound.
Identify unwanted frequencies like hum at 50/60 Hz or high-pitched whine in a recording.
Visually verify pitch by watching the fundamental frequency readout.
Observe how different sounds, instruments, and voices distribute energy across the frequency spectrum.
FFT size determines frequency resolution. Larger sizes give finer frequency detail but slower time response. Smaller sizes respond faster but blur closely spaced frequencies together.
Yes. Grant microphone permission when prompted and the visualizer will display your live input.
Audio is decoded and processed locally with the Web Audio API. Your files are never uploaded to a server.