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MUSDB18 - a corpus for music separation

Rafii, Zafar; Liutkus, Antoine; Fabian-Robert Stöter; Mimilakis, Stylianos Ioannis; Bittner, Rachel

The sigsep musdb18 data set consists of a total of 150 full-track songs of different styles and includes both the stereo mixtures and the original sources, divided between a training subset and a test subset.

Its purpose is to serve as a reference database for the design and the evaluation of source separation algorithms. The objective of such signal processing methods is to estimate one or more sources from a set of mixtures, e.g. for karaoke applications. It has been used as the official dataset in the professionally-produced music recordings task for SiSEC 2018, which is the international campaign for the evaluation of source separation algorithms.

musdb18 contains two folders, a folder with a training set: “train”, composed of 100 songs, and a folder with a test set: “test”, composed of 50 songs. Supervised approaches should be trained on the training set and tested on both sets.

All files from the musdb18 dataset are encoded in the Native Instruments stems format (.mp4). It is a multitrack format composed of 5 stereo streams, each one encoded in AAC @256kbps. These signals correspond to:

  • 0 - The mixture,
  • 1 - The drums,
  • 2 - The bass,
  • 3 - The rest of the accompaniment,
  • 4 - The vocals.

For each file, the mixture correspond to the sum of all the signals. All signals are stereophonic and encoded at 44.1kHz.

As the MUSDB18 is encoded as STEMS, it relies on ffmpeg to read the multi-stream files. We provide a python wrapper called stempeg that allows to easily parse the dataset and decode the stem tracks on-the-fly.

Restricted Access

You may request access to the files in this upload, provided that you fulfil the conditions below. The decision whether to grant/deny access is solely under the responsibility of the record owner.


The musdb is provided for educational purposes only and the material contained in them should not be used for any commercial purpose without the express permission of the copyright holders:

  • 100 tracks are taken from the DSD100 data set, which is itself derived from The ‘Mixing Secrets’ Free Multitrack Download Library. Please refer to this original resource for any question regarding your rights on your use of the DSD100 data.
  • 46 tracks are taken from the MedleyDB licensed under Creative Commons (BY-NC-SA 4.0).
  • 2 tracks were kindly provided by Native Instruments originally part of their stems pack.
  • 2 tracks a from from the Canadian rock band The Easton Ellises as part of the heise stems remix competition, licensed under Creative Commons (BY-NC-SA 3.0).

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