Million Song Dataset. The Million Song Dataset is a freely-available collection of audio features and metadata for a million contemporary popular music tracks.
Its purposes are: To encourage research on algorithms that scale to commercial sizesTo provide a reference dataset for evaluating researchAs a shortcut alternative to creating a large dataset with APIs (e.g. The Echo Nest's)To help new researchers get started in the MIR field The core of the dataset is the feature analysis and metadata for one million songs, provided by The Echo Nest.