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Friture
What it is
Friture is a free, open-source real-time audio analyzer for examining audio signals and room or receiver behavior. Its views include a spectrum analyzer, rolling 2D spectrogram, fraction-of-octave analyzer, scope, pitch tracker, delay estimator, and level display. The spectrum view shows frequency components, recent peaks, and the global maximum frequency, with configurable response time. Delay estimation uses cross-correlation between two input channels and works only in two-channel mode. The level view reports peak and RMS power in dBFS using 25 ms and 300 ms response times. A signal generator produces sine, pink-noise, white-noise, sweep, and burst signals. Downloads are available for Windows, macOS, and Linux, including a Windows Microsoft Store option and Linux AppImage. Friture uses GPLv3+ licensing and does not collect microphone or personal data.
For and against
For
- Free and open source
- Multiple real-time analysis views
- Built-in test-signal generator
- Windows, macOS, and Linux versions
- No microphone or personal-data collection
Against
- Delay estimator requires two-channel mode
- Documentation is currently limited
- Windows installer is unsigned
- macOS app is not notarized
The verdict
Friture offers broad real-time audio analysis and signal-generation tools without a license fee. Installation safeguards and limited documentation may require extra attention.
Who it suits
Friture suits people analyzing live audio, room behavior, or receiver signals on Linux, macOS, or Windows. It is also relevant to users seeking free open-source software.
Plans and prices
Friture
Free and open source; Windows, macOS, and Linux
Read 11 Oct 2026 · friture.org
On the record
- Analysis widgets
- It provides a spectrum analyzer, rolling 2D spectrogram, fraction-of-octave analyzer, scope, pitch tracker, and delay estimator.friture.org · read 11 Oct 2026
- Audio generator
- It includes a generator for sine, pink noise, white noise, sweep, and burst signals.friture.org · read 11 Oct 2026
- Audio levels
- The level widget displays peak power with a 25 ms response time and RMS power with a 300 ms response time, in dBFS.friture.org · read 11 Oct 2026
- Audio technology
- Friture uses PortAudio through sounddevice for cross-platform audio capture, and NumPy and SciPy for audio processing.friture.org · read 11 Oct 2026
- Delay estimation
- The delay estimator uses cross-correlation to measure delay between two input channels and works only in two-channel mode.friture.org · read 11 Oct 2026
- Documentation
- The project says there is not much documentation currently and points contributors to its Sphinx manual and wiki.friture.org · read 11 Oct 2026
- Downloads
- The download page offers Windows, macOS, and Linux versions, with a Windows Microsoft Store option and a Linux AppImage.friture.org · read 11 Oct 2026
- License
- Friture is free and open source under GPLv3+.friture.org · read 11 Oct 2026
- Other distribution
- The site recommends checking distribution packages or using the PyPI package for other platforms, and notes some dependencies may need manual installation.friture.org · read 11 Oct 2026
- Privacy
- The application does not collect microphone data or other personal data; the website says it uses no cookies and does not store or analyze user activity.friture.org · read 11 Oct 2026
- Purpose
- Friture is a real-time audio analyzer for understanding audio signals and room or receiver behavior.friture.org · read 11 Oct 2026
- Security limitation
- The Windows installer is unsigned, and the macOS app is not notarized and may need to be manually whitelisted in macOS Security settings.friture.org · read 11 Oct 2026
- Spectrum
- The spectrum widget shows frequency components, recent peaks, and the frequency of the global maximum; its response time is configurable.friture.org · read 11 Oct 2026
- Support
- Users can report installation or runtime problems and submit feature requests through GitHub Issues.friture.org · read 11 Oct 2026
