Novoic's audio feature extraction library.
Pydiogment aims to simplify audio augmentation. It generates multiple audio files based on a starting mono audio file.
Note length, tempo, velocity, progression and other stuff are minor worries in comparison. Those things can be felt, without learning.
tinytag is a library for reading music meta data of MP3, OGG, OPUS, MP4, M4A, FLAC, WMA and Wave files with python.
TimeSide is a python framework enabling low and high level audio analysis, imaging, transcoding, streaming and labelling.
Tap into The Echo Nest's Musical Brain for the best music search, information, recommendations and remix tools on the web.
mingus is a package for Python used by programmers, musicians, composers and researchers to make and analyse music.
eyeD3 is a Python tool for working with audio files, specifically MP3 files containing ID3 metadata (i.e. song info).
django-elastic-transcoder is an Django app, let you integrate AWS Elastic Transcoder in Django easily.