Bach or Mock? A Grading Function for Chorales in the Style of J.S. Bach

• URL: http://arxiv.org/abs/2006.13329v3
• Date: Fri, 17 Jul 2020 16:25:28 GMT
• Title: Bach or Mock? A Grading Function for Chorales in the Style of J.S. Bach
• Authors: Alexander Fang, Alisa Liu, Prem Seetharaman, Bryan Pardo
• Abstract summary: We introduce a grading function that evaluates four-part chorales in the style of J.S. Bach along important musical features. We show that the function is both interpretable and outperforms human experts at discriminating Bach chorales from model-generated ones.
• Score: 74.09517278785519
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Deep generative systems that learn probabilistic models from a corpus of existing music do not explicitly encode knowledge of a musical style, compared to traditional rule-based systems. Thus, it can be difficult to determine whether deep models generate stylistically correct output without expert evaluation, but this is expensive and time-consuming. Therefore, there is a need for automatic, interpretable, and musically-motivated evaluation measures of generated music. In this paper, we introduce a grading function that evaluates four-part chorales in the style of J.S. Bach along important musical features. We use the grading function to evaluate the output of a Transformer model, and show that the function is both interpretable and outperforms human experts at discriminating Bach chorales from model-generated ones.

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