Audio waveform visualisation in Python/Django

python django audio waveform visualization
littlejim84 picture littlejim84 · Jul 20, 2010 · Viewed 7.2k times · Source

I've looked around Stack Overflow for an answer to this, but nowhere seems to give the correct answer or direction...

My project will allow a user to upload a WAV, which ultimately will be converted to a low quality MP3 using FFmpeg on the server and it'll all be stored and served on Amazon S3. The next obstacle is working out how to extract a reliable waveform visualisation from this uploaded sound. I'm using Python and Django on Linux Ubuntu 10 on a VPS for this project...

I'm, at the vert least, needing some sort of direction... I'm at a lost of where to start to look for such a tool?

Answer

tom10 picture tom10 · Jul 20, 2010

To make a graph or plot of the waveform, the usual Python appoach is to get the waveform into a numpy array, and then use matplotlib to make the plot.

The easiest way to read the data into a numpy array is to use scipy.io.wavfile.read, though if you prefer not to use scipy (it's a big package), it's not difficult to read and convert the data using Python's wav module.

Related questions

'pip' is not recognized as an internal or external command

I'm running into a weird error when trying to install Django on my computer. This is the sequence that I typed into my command line: C:\Python34> python get-pip.py Requirement already up-to-date: pip in c:\python34\lib\site-packages …

Read More
No module named MySQLdb

I am using Python version 2.5.4 and install MySQL version 5.0 and Django. Django is working fine with Python, but not MySQL. I am using it in Windows Vista.

Read More
How to check Django version

I have to use Python and Django for our application. So I have two versions of Python, 2.6 and 2.7. Now I have installed Django. I could run the sample application for testing Django succesfuly. But how do I make sure whether …

Read More