This paper presents a comprehensive documentation of RenCon 2025, the revival of the expressive performance rendering competition which took place at ISMIR 2025 in Daejeon, Korea. The competition attracted 9 entries from international research groups, representing diverse approaches to expressive piano performance rendering. The two-phase assessment structure comprised a preliminary online evaluation and live real-time rendering at the conference. We analyze the competition format, participant demographics, system performance, and lessons learned for future iterations. The results demonstrate significant advances in expressive rendering capabilities while highlighting remaining challenges in achieving human-level musical expression.

翻译：本文全面记录了RenCon 2025竞赛——一场富有表现力的演奏渲染竞赛的复兴，该竞赛于2025年在韩国大田举行的ISMIR会议上举办。竞赛吸引了来自国际研究团体的9个参赛作品，代表了多种富有表现力的钢琴演奏渲染方法。两阶段的评估架构包括初步在线评估和会议期间的现场实时渲染。我们分析了竞赛形式、参与者构成、系统性能以及为未来迭代积累的经验教训。结果展示了富有表现力渲染能力的显著进步，同时突显了在实现人类水平音乐表达方面仍存在的挑战。