Spek helps to analyse your audio files by showing their spectrogram.
It supports all popular lossy and lossless audio file formats.

Features:
* Ultra-fast signal processing, uses multiple threads to further
speed up the analysis
* Shows the codec name and the audio signal parameters
* Can save the spectrogram as an image file
* Drag-and-drop support; associates with common audio file formats
* Auto-fitting time, frequency and spectral density rulers
* Adjustable spectral density range