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I undertaking a personal project which involves the development of a system which will automatically generate audio thumbnail clips (about 30 seconds in length) from a full length track.
In order to do this I want to look at the energy and pitch of the audio to try and correctly identify its major structural features.
Is there any open source software available that can do energy/pitch extraction? If not I will start looking into alternative methods using MATLAB.
Thanks!
You might want to look into the Echo Nest API. It has a lot of audio analysis capabilities, and I know there’s a script bundled in the Remix package that can automagically turn songs into shorter or longer versions (I believe the script is called earworm).