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SPECIFICTION
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SotF

sotf.spinorama.org

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Spec score 7.4 #14 of 22 in Audio Equalizer Software

What it is

SotF is a free, open-source audio player and optimizer for room and headphone sound, available for Linux, macOS and Windows. It plays FLAC, MP3, AAC, ALAC and Vorbis files, and lists more than 40 audio plugins for equalization, compression, limiting, upmixing, binaural processing, convolution and denoising. Room EQ analyzes room response and calculates correction filters for a plugin chain; using it requires a measurement microphone, its calibration file and connected speakers. Headphone EQ calculates parametric filters targeting the Harman curve for hundreds of measured headphone models. Spinorama EQ provides correction for thousands of speakers without a microphone. SotF can export settings for CamillaDSP, Equalizer APO, EasyEffects, Wavelet, PipeWire and Roon. On macOS, a CoreAudio HAL virtual device can route audio from other apps through a configured plugin chain. The app runs on the user’s machine and says it does not collect user data or listening history. Speaker EQ queries the public Spinorama API for the selected model. SotF is GPL-3.0 licensed and has no subscription.

Spec sheet

Product
SotF is a free, open-source audio player and optimizer for sound in rooms and headphones.Read 30 Sep 2026 · sotf.spinorama.org
Privacy
SotF says it collects no user data and uses no analytics, telemetry, cookies, or tracking.Read 30 Sep 2026 · sotf.spinorama.org
Support
Users can submit feedback or bug reports through GitHub and join the AudioScienceReview discussion linked from the product page.Read 30 Sep 2026 · sotf.spinorama.org
Maker
The site credits SotF to Pierre F. Aubert.Read 30 Sep 2026 · sotf.spinorama.org
Audio export
SotF lists export support for CamillaDSP, Equalizer APO, EasyEffects, Wavelet, PipeWire, and Roon.Read 30 Sep 2026 · sotf.spinorama.org
Audio plugins
The product page lists more than 40 audio plugins, including EQ, compression, limiting, upmixing, binaural processing, convolution, and denoising.Read 30 Sep 2026 · sotf.spinorama.org
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.Read 30 Sep 2026 · sotf.spinorama.org
Headphone EQ
Headphone EQ calculates parametric filters targeting the Harman curve and supports hundreds of measured headphone models.Read 30 Sep 2026 · sotf.spinorama.org
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.Read 30 Sep 2026 · sotf.spinorama.org
Music playback
Its music player supports FLAC, MP3, AAC, ALAC, and Vorbis files.Read 30 Sep 2026 · sotf.spinorama.org
Room correction
Room EQ measures and analyzes room response, then calculates correction filters to apply in a plugin chain.Read 30 Sep 2026 · sotf.spinorama.org
Room EQ equipment
Room correction requires a measurement microphone and its calibration file, in addition to SotF and connected speakers.Read 30 Sep 2026 · sotf.spinorama.org
Speaker EQ
Spinorama EQ provides correction for thousands of speakers from spinorama.org without requiring a microphone.Read 30 Sep 2026 · sotf.spinorama.org
System audio
On macOS, a CoreAudio HAL virtual device can route audio from all apps through a configured SotF plugin chain.Read 30 Sep 2026 · sotf.spinorama.org

Plans and prices

Free Free Free · open source (GPL-3.0) · no subscription Read 30 Sep 2026 · sotf.spinorama.org

Every SotF plan and price →

Strong points and limits

Strong points

  • Plays five listed audio file formats.
  • Lists more than 40 audio plugins.
  • Speaker EQ covers thousands of models without a microphone.
  • Exports settings for six named audio tools.

Limits

  • Room correction requires a measurement microphone and calibration file.
  • Speaker EQ queries the public Spinorama API.
  • System-wide virtual-device routing is listed for macOS.

Who it suits

It suits listeners who want local playback and audio correction for rooms, headphones or speakers. Room correction requires a measurement microphone and calibration file; speaker correction can be used without a microphone.

Verdict

SotF is free, open source and runs on three desktop operating systems. Its correction options vary by setup: room EQ needs measurement equipment, while Spinorama speaker EQ does not.

Where Specifiction places it

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