During musical collaboration, visual cues are essential for communication between musicians. Extended Reality (XR) applications, often used with head-mounted displays like Augmented Reality (AR) glasses, can limit the field of view (FOV) of players. We conducted a study to investigate the effects of limited FOV on co-presence, gesture recognition, overall enjoyment, and reaction time. Initially, we observed experienced musicians collaborating informally with and without visual occlusion, noting that collaboration suffered with limited FOV. We then conducted a within-subjects study with 19 participants, comparing an unrestricted FOV holographic setup called HoloJam to Nreal AR glasses with a 52$^{\circ}$ limited FOV. In the AR setup, we tested two conditions: standard AR with a 52$^{\circ}$ FOV and a modified AR notification system called Mini Musicians. Results showed that HoloJam provided higher co-presence, quicker gesture recognition, and greater enjoyment. The Mini Musicians application reduced reaction time and maintained enjoyment compared to the standard AR setup. We conclude that limited FOV impacts musical collaboration, but notifications can improve reaction time and should be considered in future XR music collaborations.

翻译：在音乐协作过程中，视觉线索对于音乐家之间的沟通至关重要。扩展现实（XR）应用通常与头戴式显示器（如增强现实（AR）眼镜）结合使用，这可能会限制使用者的视场（FOV）。我们开展了一项研究，旨在探究有限视场对共在感、手势识别、整体愉悦度及反应时间的影响。首先，我们观察了经验丰富的音乐家在有无视觉遮挡条件下的非正式协作，发现有限视场会损害协作效果。随后，我们进行了一项包含19名参与者的被试内研究，比较了名为HoloJam的无限制视场全息设置与具有52$^{\circ}$有限视场的Nreal AR眼镜。在AR设置中，我们测试了两种条件：标准52$^{\circ}$视场AR，以及一种名为Mini Musicians的改进型AR通知系统。结果表明，HoloJam提供了更高的共在感、更快的手势识别速度和更强的愉悦感。与标准AR设置相比，Mini Musicians应用缩短了反应时间并保持了愉悦度。我们的结论是：有限视场会影响音乐协作，但通知系统能够改善反应时间，应在未来的XR音乐协作中予以考虑。