Spek helps to analyse your audio files by showing their spectrogram. Spek is free software available for Unix, Windows and Mac OS X. This spectrogram utility supports all popular lossy and lossless audio file formats thanks to the FFmpeg libraries.Drag-and-drop support; associates with common audio file formats.
It allows you to monitor the spectral content of your audio signal in real time.
Uses your PC sound card to create audio frequencies in the range 100 to 15000 Hz
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