Tool to perform spectral analysis of audio file. Spectrum analysis calculates the frequency of certain components of a signal, especially sound, these frequencies can be manipulated to hide data in an audio file.
Spectral Analysis - dCode
Tag(s) : Steganography
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Sometimes a text (some letters) or an image (rather a silhouette) is hidden in the sound spectrum.
dCode allows playback of audio files (WAV, MP3, etc.) and analysis of sound frequencies to render it in different colors and positioned on a sound frequency axis.
A list of free tools to get a spectral analysis or audio spectrum:
Example: Audacity : here (link) (Menu Analyze then Spectrum).
Example: AVS Audio Editor : here (link) (Button Spectral in the toolbar).
The tools offer other options such as representation of the signal or sound frequencies.
dCode suggests these tools (free):
Example: Coagula Light : here (link) (Draw with the brush in the left window (black) then click Sound> Render Image, then File> Save sound As).