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——于韩国大田ISMIR 2025会议上复兴的表达性演奏渲染竞赛。该竞赛吸引了来自国际研究团队的9项参赛作品，代表了表达性钢琴演奏渲染的多样化方法。两阶段评估结构包括初步在线评估和会议现场的实时渲染。我们分析了竞赛形式、参与者构成、系统性能以及为未来赛事积累的经验教训。结果表明，表达性渲染能力取得了显著进步，同时揭示了在实现人类水平音乐表达方面仍存在的挑战。