Audio Spectrogram Image Online
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Audio Spectrogram Image
Export a frequency-versus-time spectrogram PNG from your recording. A Hann-windowed Fourier transform maps spectral magnitude to color. The vertical axis uses a logarithmic frequency scale; the image is a visualization, not audio enhancement.
- Dedicated audio spectrogram image controls
- Local PNG export
- Full-track visual output
Read time and frequency together
Horizontal position follows the recording timeline. The logarithmic vertical scale runs from low bass near the bottom toward the sample-rate Nyquist limit at the top, with color indicating spectral magnitude.
Choose an FFT resolution
A 4096-sample window separates nearby frequencies more finely than 1024 samples, but averages over a longer interval. Choose smaller windows for quick attacks or larger windows for stable tones and harmonics.
Adjust the visible floor
Dynamic range controls how many decibels below the strongest reference remain visible. A larger range reveals quiet texture; a smaller range emphasizes stronger components and can make faint background energy disappear visually.
Save a frequency illustration
The exported PNG uses one thousand sampled time positions from the first channel. It is useful for documentation and comparison, but it is not an editable spectrogram mask or a method for removing unwanted frequencies.
Technical references: Web Audio API specification