Spek – Acoustic Spectrum Analyser

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.

Features

• 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.
• 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.
• Adjustable spectral density range.
• Translated into 19 languages.

Screenshots

Download

spek-0.8.5.tar.xz (421 KiB) instructions manual

spek-0.8.2.msi (8.47 MiB) spek-0.8.2.zip (8.35 MiB) instructions

spek-0.8.3.dmg (6.03 MiB) instructions

News

• 2023-01-09: Spek 0.8.5 Released
• 2022-07-10: Spek 0.8.4 Released
• 2014-08-31: Faster Fast Fourier Transform
• 2012-09-23: Spek 0.8.0 Released
• 2011-08-17: Spek and Lion
• 2011-04-24: Spek 0.7 Released
• 2011-03-16: Spek status update

Contribute

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.