Skip to content
EN

Software · Audio & music

FMIT

Free Musical Instrument Tuner (FMIT), a Tool for tuning musical instrument.

  • Completely free
  • Windows, macOS and Linux
  • Open source

Overview

FMIT is a tuner and metronome program, available on Windows, macOS and Linux.

Features described in its Flathub listing and on its official website: statistics and charts.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information
  • “Free Musical Instrument Tuner (FMIT), a Tool for tuning musical instrument” — Flathub, 10 November 2026
  • “Tune your musical instruments with advanced features, including traces of frequency and volume, adjustable base tuning frequency, multiple choices of tuning scale (chromatic, Werckmeister III, Kirnberger III,…” — Flathub, 10 November 2026

At a glance

All of FMIT is free: no feature is locked behind a paid plan, and its code is open.

Its licence (GPL-2.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Plans and conditions

  • Free content: the free library can be used without paying, under the publisher’s licence.

Strengths

  • Open source code
  • Commercial use allowed

About

Find an estimation of the fundamental frequency (f0, not the perceived pitch) of an audio signal, in real-time, and compare it with the closest note in the scale. Tune your musical instruments with advanced features, including traces of frequency and volume, adjustable base tuning frequency, multiple choices of tuning scale (chromatic, Werckmeister III, Kirnberger III, diatonic and meantone), microtonal tuning with Scala file (.scl) support and statistics. Perform real-time sound analysis with views for waveform period, harmonics amplitude and Discrete Fourier Transform (DFT). Change various analysis parameters and tradeoff between precision and speed. Choose between multiple sound capture systems, including ALSA and JACK. Show or hide individual panels and go from a simple analog tuner view to an advanced real-time analysis toolset, or anywhere in between.

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Official plan pages (pricing, licence, terms) (limits, commercial use) —
  • Facts collected from Unspecified source (platforms) —
  • Facts collected from Flathub (credit card, publisher, licence, free status, platforms, commercial use, version) —
  • Last technical check: 8 November 2026
  • Description from Flathub — AppStream (Flathub)

How listings are built →

Do you develop FMIT?

Correct this listing with the report form, or cite it with this optional badge (it shows the verified free status and changes nothing in the ranking):

<a href="https://licitpro.fr/en/resource/fmit"><img src="https://licitpro.fr/badge/fmit.svg?l=en" alt="Listed on LicitPro" height="20"></a>

Developers and publishers →

In the same category

Spotify

Software

Online music streaming service.

Free, with trade-offsWinLinux

Easy Effects

Software · Open source

Easy Effects is an audio effects and equaliser program, available on Linux.

Completely freeLinux

Audacity

Software · Open source

Audacity is the world's most popular audio editing and recording app.

Completely freeWinMacLinux

Shortwave

Software · Open source

Shortwave is a radio program, available on Linux: casting to other devices (Chromecast, DLNA…).

Completely freeLinux

Rufin

Software · Open source

Rufin is a music player, available on Linux and Android: web interface, sync across devices and lyrics display.

Completely freeLinuxAndroid

Strawberry Music Player

Software · Open source

Strawberry Music Player is a music player, available on Windows, macOS and Linux: playlists, lyrics display and equaliser.

Completely freeWinMacLinux