Music102: An $D_{12}$-equivariant transformer for chord progression accompaniment

• URL: http://arxiv.org/abs/2410.18151v1
• Date: Wed, 23 Oct 2024 03:11:01 GMT
• Title: Music102: An $D_{12}$-equivariant transformer for chord progression accompaniment
• Authors: Weiliang Luo,
• Abstract summary: Music102 enhances chord progression accompaniment through a D12-equivariant transformer. By encoding prior music knowledge, the model maintains equivariance across both melody and chord sequences. This work showcases the adaptability of self-attention mechanisms and layer normalization to the discrete musical domain.
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• Abstract: We present Music102, an advanced model built upon the Music101 prototype, aimed at enhancing chord progression accompaniment through a D12-equivariant transformer. Inspired by group theory and symbolic music structures, Music102 leverages musical symmetry--such as transposition and reflection operations--integrating these properties into the transformer architecture. By encoding prior music knowledge, the model maintains equivariance across both melody and chord sequences. The POP909 dataset was employed to train and evaluate Music102, revealing significant improvements over Music101 in both weighted loss and exact accuracy metrics, despite using fewer parameters. This work showcases the adaptability of self-attention mechanisms and layer normalization to the discrete musical domain, addressing challenges in computational music analysis. With its stable and flexible neural framework, Music102 sets the stage for further exploration in equivariant music generation and computational composition tools, bridging mathematical theory with practical music performance.

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