Euphonica is an MPD client with integrated spectrum visualiser, metadata downloading & more.


+6
Terminal-based retro music player featuring classic design, local file support, online streams, podcasts, YouTube, Spotify, visualizer, EQ, and self-hosted server integration.


Write Web Audio API code and instantly see the graph it creates. Inspect signal flow, tweak parameters, and hear every change in real time. Runs entirely in your browser. No account required.


+1
Spectrum Spectogram Analyzer was designed with accuracy and easy of use in mind. It can be used for monitoring or measuring environmental sound or noise; help tuning instruments; timing short sound events; and educational purpose.
Cost / License
- Free
- Open Source (Apache-2.0)
Platforms
- Android
- F-Droid


GNU Radio is a free & open-source software development toolkit that provides signal processing blocks to implement software radios. It can be used with readily-available low-cost external RF hardware to create software-defined radios, or without hardware in a simulation-like...
Cost / License
- Free
- Open Source
Platforms
- Windows
- Linux

Spectro is a freeware audio file analyzer for windows. Currently capable of reading FLAC, APE, MP3 and WAV files. Spectro lets you view vital data about compressed audio files and creates a spectrogram of the wave data.
Cost / License
- Free
- Proprietary
Platforms
- Windows


The Gnome Chemistry Utils include six chemistry related programs:
- GChemPaint, a 2D chemical formula editor.
- a chemical calculator (computes raw formule, molar weight, mass composition and isotopic pattern).
- a molecule 3d viewer using OpenGL to display molecular models. .
Cost / License
- Free
- Open Source
Platforms
- Linux


+2
inspectrum is a tool for analysing captured signals, primarily from software-defined radio receivers.
Cost / License
- Free
- Open Source (GPL-3.0)
Platforms
- Mac
- Linux


+1
Baudline is a time-frequency browser designed for scientific visualization of the spectral domain. Signal analysis is performed by Fourier, correlation, and raster transforms that create colorful spectrograms with vibrant detail.
Cost / License
- Free
- Proprietary
Platforms
- Mac
- Linux
- BSD


+1
A graphical application for showing the Fast Fourier Transformation (FFT) as graph and waterfall diagram of the radio spectrum retrieved by Software Defined Radio (SDR) devices supported by GrOsmoSDR. Plugins enable demodulating a selected signal.
Cost / License
- Free
- Open Source
Platforms
- Linux


Modeled after the spectrum effect in Ableton Live , Spectrum is a free and open-source web app that shows frequencies of an MP3 or OGG file in real-time.
Cost / License
- Free
- Open Source (MIT)
Platforms
- Online


A multi-purpose graphical, educational, scientific, interactive, online, multimedia presentation / physics tool to explore, learn, calculate and visualise everything around the electromagnetic spectrum. Shows bands, discrete frequencies, graphs..
Cost / License
- Free Personal
- Open Source
Platforms
- Online

Point your iPhone at any sound source and see the decibel level in real time on a clean analog gauge. Perfect for concerts, restaurants, offices, nurseries, and noisy neighbors.
Cost / License
- Freemium
- Proprietary
Platforms
- iPhone


+1




















































