Investigating the Performance and Energy Costs of Replicating Band-Split RNN for Music Source Separation

Paul Magron; Romain Serizel; Constance Douwes

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arXiv · 2609.21918

Investigating the Performance and Energy Costs of Replicating Band-Split RNN for Music Source Separation

Paul Magron·Romain Serizel·Constance Douwes

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Abstract

Band-split recurrent neural network (BSRNN) is a popular music source separation model that yields close to state-of-the-art results using reasonable computational resources and public datasets. It is therefore interesting from a reproducible research perspective, but achieving its performance is not straightforward since its full code is not available. In this paper, we conduct a replication of BSRNN via implementing the full pipeline. We extend the original paper's analysis by experimentally studying various design choices about data preprocessing, the optimization protocol, and architectural parameters. We report and discuss this project's energy cost, and we underline how its footprint could have been substantial lower upon availability of the full pipeline, which advocates for more reproducible research practices. To comply with this objective, we publicly release our code and pre-trained models.

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Paul Magron, Romain Serizel, Constance Douwes. 2026-09-18. Investigating the Performance and Energy Costs of Replicating Band-Split RNN for Music Source Separation. https://arxiv.org/abs/2609.21918

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