Gratis Audio Visualization and Analysis Software

Question

I am not certain that I will be able to describe this correctly, but I am in need of a gratis Audio Visualization software. Something that is able to display frequency strength in multiple display types (Bars, Waveform, Spectrum).

Requirements:

• Windows 10 Compatible
• Gratis (Open source would be a plus)
• Customizable/Able to create skins for the output (As well as custom resolutions for the skins)
• Variable accuracy/number of frequency bands that are analyzed
• Multiple outputs for multiple audio tracks in a file
• Support for multiple file types (Specifically MIDI and FLAC)

Nice to Have:

• Able to pass a system audio device to be analyzed
• EQ with a variable amount of frequency bands
• API to analyze the audio
• Debug/Analysis output and playback (Realtime scrubbing, logging frequency distribution for a specific portion of an audio clip)

Answer 1

The sort of analysis & customisation that you are looking for are available with the combination of python, and PyAudioAnalysis which uses a combination of numpy/SciPy & matplotlib, you can also take a look at plot.ly, bokeh, etc. for the actual visualisation.

This paper gives some examples of it's use as does the wiki.

• Windows 10, and earlier plus OS-X/Linux/
• Free, Gratis & Open Source
• Multiple file types: Already supports a few formats but PySoundFile is your friend. For MIDI, (which is not actually a sound file), you would need to use one of the many python packages that can convert midi to audio.
• High level of customisation.

You should also take a look at the tools listed on PythonInMusic for Audion Analysis. One such option is Friture:

For a less flexible, but ready rolled, solution you might like to take a look at Audacity.