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