SotF
- Android app
- Not listed
- Free plan
- Yes
- Runs on
- Linux, Mac, Windows
Summary
SotF is a free, open-source audio player and optimizer for Linux, macOS, and Windows. It plays FLAC, MP3, AAC, ALAC, and Vorbis files, and offers more than 40 audio plugins, including equalization, compression, limiting, upmixing, binaural processing, convolution, and denoising. For room correction, it measures and analyzes room response to calculate filters for a plugin chain; this setup requires a measurement microphone, its calibration file, and connected speakers. Headphone EQ generates parametric filters aimed at the Harman curve for hundreds of measured headphone models. Spinorama EQ provides speaker correction for thousands of models without a microphone. SotF can export settings for CamillaDSP, Equalizer APO, EasyEffects, Wavelet, PipeWire, and Roon. On macOS, a virtual CoreAudio HAL device can route audio from other apps through a configured plugin chain. The application runs locally and says it collects no user data or listening history. Speaker EQ does query the public Spinorama API for the chosen model. SotF is GPL-3.0 licensed, with a price of 0.00 USD per free and no subscription.
Who it is for
SotF suits listeners who want local music playback and audio correction for rooms, headphones, or speakers. Room correction requires measurement equipment; speaker correction does not require a microphone.
What is good
- Plays FLAC, MP3, AAC, ALAC, and Vorbis files
- Offers more than 40 audio plugins
- Headphone EQ covers hundreds of measured models
- Exports settings for six named audio tools
- Runs locally and says it collects no user data
What to know first
- Room correction requires a measurement microphone and calibration file
- Speaker EQ queries the public Spinorama API
- Desktop releases are for Linux, macOS, and Windows
Verdict
SotF combines music playback with room, headphone, and speaker correction across three desktop operating systems. Its room-measurement workflow requires extra equipment, while its speaker correction can work without a microphone.
SotF plans and pricing
All plansCompared on audio equalizer software
- Free plan
- Yessotf.spinorama.org
- System-wide control
- Yessotf.spinorama.org
- Parametric EQ
- Yessotf.spinorama.org
- Desktop operating systems
- bothsotf.spinorama.org
Facts
- Product
- SotF is a free, open-source audio player and optimizer for sound in rooms and headphones.sotf.spinorama.org · 30 Sept 2026
- Music playback
- Its music player supports FLAC, MP3, AAC, ALAC, and Vorbis files.sotf.spinorama.org · 30 Sept 2026
- Audio plugins
- The product page lists more than 40 audio plugins, including EQ, compression, limiting, upmixing, binaural processing, convolution, and denoising.sotf.spinorama.org · 30 Sept 2026
- Room correction
- Room EQ measures and analyzes room response, then calculates correction filters to apply in a plugin chain.sotf.spinorama.org · 30 Sept 2026
- Room EQ equipment
- Room correction requires a measurement microphone and its calibration file, in addition to SotF and connected speakers.sotf.spinorama.org · 30 Sept 2026
- Headphone EQ
- Headphone EQ calculates parametric filters targeting the Harman curve and supports hundreds of measured headphone models.sotf.spinorama.org · 30 Sept 2026
- Speaker EQ
- Spinorama EQ provides correction for thousands of speakers from spinorama.org without requiring a microphone.sotf.spinorama.org · 30 Sept 2026
- Audio export
- SotF lists export support for CamillaDSP, Equalizer APO, EasyEffects, Wavelet, PipeWire, and Roon.sotf.spinorama.org · 30 Sept 2026
- System audio
- On macOS, a CoreAudio HAL virtual device can route audio from all apps through a configured SotF plugin chain.sotf.spinorama.org · 30 Sept 2026
- Privacy
- SotF says it collects no user data and uses no analytics, telemetry, cookies, or tracking.sotf.spinorama.org · 30 Sept 2026
- Local processing
- The application runs on the user's machine and does not upload music or listening history; speaker EQ queries the public Spinorama API for the searched speaker model.sotf.spinorama.org · 30 Sept 2026
- Downloads
- The download page lists macOS, Windows, and Linux releases, with stable desktop releases through platform stores and beta or command-line builds through GitHub Releases.sotf.spinorama.org · 30 Sept 2026
- Support
- Users can submit feedback or bug reports through GitHub and join the AudioScienceReview discussion linked from the product page.sotf.spinorama.org · 30 Sept 2026
- Maker
- The site credits SotF to Pierre F. Aubert.sotf.spinorama.org · 30 Sept 2026
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Sources
- sotf.spinorama.org· checked 30 Sept 2026
- sotf.spinorama.org/guides/room-correction/· checked 30 Sept 2026
- sotf.spinorama.org/guides/headphone-eq/· checked 30 Sept 2026
- sotf.spinorama.org/guides/macos-daemon/· checked 30 Sept 2026
- sotf.spinorama.org/privacy/· checked 30 Sept 2026