Music Source Restoration (MSR) aims to recover original, unprocessed instrument stems from professionally mixed and degraded audio, requiring the reversal of both production effects and real-world degradations. We present the inaugural MSR Challenge, which features objective evaluation on studio-produced mixtures using Multi-Mel-SNR, Zimtohrli, and FAD-CLAP, alongside subjective evaluation on real-world degraded recordings. Five teams participated in the challenge. The winning system achieved 4.46 dB Multi-Mel-SNR and 3.47 MOS-Overall, corresponding to relative improvements of 91% and 18% over the second-place system, respectively. Per-stem analysis reveals substantial variation in restoration difficulty across instruments, with bass averaging 4.59 dB across all teams, while percussion averages only 0.29 dB. The dataset, evaluation protocols, and baselines are available at https://msrchallenge.com/.

翻译：音乐源分离修复（MSR）旨在从专业混音及受损音频中恢复原始未处理的乐器音轨，这需要同时逆转制作效果与现实环境中的音频劣化。本文介绍了首届MSR挑战赛，该赛事采用多梅尔信噪比、Zimtohrli感知指标和FAD-CLAP嵌入距离对录音室制作混音进行客观评估，并对真实场景受损录音进行主观评价。五支参赛队伍参与了本次挑战。获胜系统取得了4.46 dB的多梅尔信噪比和3.47的整体平均意见分数，分别较第二名系统实现了91%和18%的相对性能提升。分轨分析表明不同乐器的修复难度存在显著差异：所有参赛队伍对贝斯音轨的平均修复信噪比达4.59 dB，而打击乐器音轨的平均信噪比仅为0.29 dB。相关数据集、评估协议与基线系统已发布于https://msrchallenge.com/。