将和弦生成拆解为三阶段，提升风格与理论可行性的可控性。
A Decomposed Retrieval-Edit-Rerank Framework for Chord Generation
- 分三步生成：先检索风格合理候选，再最小修改确保理论正确，最后重排序优选。
- 在多样性与音乐理论可行性间平衡优于所有端到端模型。
- 适合需要可解释、可调参的音乐创作系统开发者。
和弦生成是一项本质受限的创造性任务，需在风格多样性与音乐理论可行性之间取得平衡。现有方法通常将候选生成与约束强制整合于单一模型中，导致多样性与可行性之间的权衡难以控制与解释。本文从系统层面出发，提出一种检索-编辑-重排序（RER）框架，将任务分解为三个明确阶段：i）检索，定义风格合理的候选空间；ii）编辑，通过最小修改强制音乐理论可行性；iii）重排序，解决可行候选间的软偏好问题。该分离设计提供了一个可控流程，每个组件分别处理生成过程的不同方面，从而增强输出的可解释性与可调节性。通过客观指标与主观评估，本系统在平衡和弦多样性与音乐理论可行性上优于所有端到端基线。消融实验进一步验证了各阶段在创意探索与约束满足中的互补作用。
原文摘要 · Abstract (English)
Chord generation is an inherently constrained creative task that requires balancing stylistic diversity with music-theoretic feasibility. Existing approaches typically entangle candidate generation and constraint enforcement within a single model, making the diversity-feasibility trade-off difficult to control and interpret. In this work, we approach chord generation from a system-level perspective, introducing a Retrieval-Edit-Rerank (RER) framework that decomposes the task into three explicit stages: i) retrieval, which defines a stylistically plausible candidate space; ii) editing, which enforces music-theoretic feasibility through minimal modifications; and iii) reranking, which resolves soft preferences among feasible candidates. This separation provides a controllable pipeline, where each component addresses a distinct aspect of the generation process, thereby enhancing both the interpretability and adjustability of the output chords. Through objective metrics and subjective evaluation, our decomposed system outperforms all end-to-end chord generation baselines in balancing chord diversity and music-theoretic feasibility. Ablation studies further confirm the complementary roles of each stage in creative exploration and constraint satisfaction.
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