Ozone Imager
iZotope
Ozone Imager combines stereo-width control with a display of the signal's spatial behavior.
View details →THE AUDIO MAGAZINE / RESOURCES
Metering & Analysis – Free Music Software & Plug-ins
Free spectrum analyzers, meters, comparison tools and measurement applications. Production displays and calibrated measurements serve different purposes. Read the product's setup requirements and do not interpret an uncalibrated phone or audio-interface reading as a compliance result. Official documentation and supported workflows are linked from each listing.
These are researched directory entries, not hands-on reviews. Optional purchases, account requirements and limited editions are identified on product pages. Format availability can differ by operating system.
43 listings
Praat
Praat Team
Praat is a speech-analysis application with tools for inspecting pitch, formants, timing and other acoustic properties.
View details →Protokol
Hexler
Protokol monitors control-protocol traffic such as MIDI and OSC.
View details →Room EQ Wizard
Room EQ Wizard
Room EQ Wizard provides measurement and analysis tools for loudspeakers and rooms, including frequency response and time-domain views.
View details →Sonic Annotator
Centre for Digital Music / Sonic Visualiser
Sonic Annotator runs Vamp audio-analysis plug-ins over files in a repeatable batch workflow.
View details →Sonic Lineup
Sonic Lineup Project
Sonic Lineup helps compare multiple recordings of the same music by aligning them for listening and inspection.
View details →Sonic Visualiser
Sonic Visualiser Project
Sonic Visualiser is designed for studying recordings through waveforms, spectrograms and analysis layers.
View details →SPARTA
Aalto University Acoustics Lab
SPARTA is a collection of spatial-audio plug-ins based on research-oriented signal-processing tools.
View details →Spek
Spek Project
Spek displays an audio file as a spectrogram, showing how frequency content changes over time.
View details →TDR Prism
Tokyo Dawn Labs
TDR Prism is a spectrum analyzer designed to make frequency balance easier to inspect during production.
View details →ToneBoosters Legacy v3 Bundle
ToneBoosters
ToneBoosters' legacy collection makes older processing tools available separately from its current commercial range.
View details →Tuner (Bill Farmer)
Bill Farmer
Bill Farmer's Tuner is an open-source Android tuning application.
View details →Tuner (The Twom)
The Twom
The Twom's Tuner is an open-source Android instrument tuner with visual pitch information.
View details →Voxengo AnSpec
Voxengo
AnSpec presents audio levels in an analog-style spectrum display.
View details →Voxengo Correlometer
Voxengo
Correlometer examines stereo correlation across frequency bands.
View details →Voxengo SPAN
Voxengo
SPAN is a real-time spectrum analyzer with additional metering and stereo-analysis information.
View details →WaveSurfer
KTH / WaveSurfer Contributors
WaveSurfer is an audio visualization and editing application associated with speech and sound analysis.
View details →x42 Plugins
x42
The x42 collection includes open-source audio utilities, metering and specialized processing tools.
View details →Youlean Loudness Meter Free
Youlean
Youlean Loudness Meter Free measures program loudness and related level information.
View details →Availability, licensing and system requirements can change. Verification refers to official documentation and download availability, not installation or hands-on testing. Check the developer's current terms before installing.