Spek
Spek is a desktop acoustic spectrum analyzer for viewing audio spectrograms and checking the frequency content of music and sound files.
What is Spek?
Spek is an acoustic spectrum analyzer for macOS, Windows, and Unix-like systems that helps users inspect audio files by displaying their spectrograms. It is commonly used to examine the frequency content of songs, podcasts, recordings, and other sound files, including quick checks for compression artifacts or low-pass cutoffs in lossy audio. The app supports a wide range of popular lossy and lossless formats through FFmpeg libraries, so it fits easily into everyday listening, archiving, and audio-quality review workflows. Spek also shows codec and signal details alongside the visual analysis, which is useful for music collectors, audio hobbyists, and anyone comparing file quality. You can open files directly, use drag and drop, adjust the spectral density range, and save spectrograms as image files for reference or sharing.
Key features
- Open and inspect spectrograms for common lossy and lossless audio formats
- View codec information and core audio signal parameters alongside the graph
- Detect cutoff patterns and compression artifacts in audio files
- Drag and drop audio files for quick analysis
- Adjust the spectral density range to refine the display
- Save the spectrogram as an image file
- Work with time, frequency, and density rulers that fit the current file automatically
Review app leftovers with diCleaner
Inspect caches, support files, containers, and login items before cleaning.
Safety overview
Status: Safe
Spek is a normal desktop audio-analysis utility and does not need unusual system access for its main purpose. It works on audio files you choose to open, so its file access is generally limited to the locations you use during analysis. Removing it only affects your ability to view spectrograms and related app settings.
Recommendation: Keep Spek if you regularly inspect audio quality or compare music files. If you no longer use spectrogram analysis, you can remove it without affecting macOS beyond losing the app and any preferences it created.
Common paths
/Applications/Spek.app
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