Spek – Acoustic Spectrum Analyser

Spek helps to analyse your audio files by showing their spectrogram. Spek is free software available for Unix, Windows and Mac OS X.

  • Supports all popular lossy and lossless audio file formats thanks to the FFmpeg libraries.
  • Ultra-fast signal processing, uses multiple threads to further speed up the analysis.
  • High number of frequency bands for the best spectrogram quality.
  • Shows the codec name and the audio signal parameters.
  • Allows to 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.
  • Available in Dutch, English, French, German, Polish, Russian, Spanish, Swedish and Ukrainian.

http://spek-project.org/