If you plan to use this code as it is or in a modified version please let me know so maybe we can contribute to improve the code or just to keep in touch!

Notes

• the code is written in ruby programming language (great!), you can run it from command line with few modifications or use it as a library in your rails projects
• to run this code you must install some dependent gems: RMagick (which also depends on ImageMagick libraries) and NArray
• to enable the conversion from mp3 audio encoding to raw audio format you must install SoX a command line utility described as “the Swiss Army knife of sound processing programs”
• I’ve embedded some content from sox man pages near the command execution to better explain how sox works

You’ll find all useful links at the bottom of this page.

If you find this code useful please donate!

Useful links:

• SoX – http://sox.sourceforge.net/
• RMagick – http://rmagick.rubyforge.org/
• ImageMagick – http://www.imagemagick.org/
• NArray – http://narray.rubyforge.org/

This simple web application is a workbench to test audio waveform conversion to image.

Just upload an mp3 file to get its waveform in png format.