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Metacreation released this collection of 2.1 million unique MIDI files in 2026 for symbolic music research. The dataset features detailed annotations for expressive loop detection, incorporating performance nuances such as microtiming and dynamics.
The dataset is licensed under CC BY-NC 4.0, which prohibits commercial redistribution or use. It is provided in Parquet format and is compatible with Polars, Dask, and Hugging Face Datasets libraries.