Spek – Acoustic Spectrum AnalyserSpek logo

Spek (IPA: /spɛk/, ‘bacon’ in Dutch) helps to analyse your audio files by showing their spectrogram. Spek is free software available for Unix, Windows and Mac OS X.



Spek running under Ubuntu Linux Spek running under Windows 7 Spek running under Mac OS X


Mac OS X

News news feed


Spek is free and open source software licensed under GPLv3. The project is written in C++, the code is available on GitHub.

Report bugs and request new features on the issue tracker.

Translation is done via Transifex. Don't hesitate to translate Spek into a new language or to improve existing translations.

Mailing lists

spek-announce: A low volume mailing list with release announcements and other project updates.
spek-translators: Discussion and questions about translating Spek.
spek-users: User questions and community support.