This study looked into how effective a Musical Brain-Computer Interface (MBCI) can be in providing feedback about synchrony between two people. Using a double EEG setup, we compared two types of musical feedback; one that adapted in real-time based on the inter-brain synchrony between participants (Neuroadaptive condition), and another music that was randomly generated (Random condition). We evaluated how these two conditions were perceived by 8 dyads (n = 16) and whether the generated music could influence the perceived connection and EEG synchrony between them. The findings indicated that Neuroadaptive musical feedback could potentially boost synchrony levels between people compared to Random feedback, as seen by a significant increase in EEG phase-locking values. Additionally, the real-time measurement of synchrony was successfully validated and musical neurofeedback was generally well-received by the participants. However, more research is needed for conclusive results due to the small sample size. This study is a stepping stone towards creating music that can audibly reflect the level of synchrony between individuals.

翻译：本研究探讨了音乐脑机接口（MBCI）在反馈两人之间同步性方面的有效性。通过双脑电图（EEG）设置，我们比较了两种音乐反馈类型：一种基于参与者间脑同步实时自适应生成（神经自适应条件），另一种为随机生成音乐（随机条件）。我们评估了8组配对（n=16）对这两种条件的感知，以及生成音乐能否影响他们之间的感知连接与EEG同步性。结果表明，相较于随机反馈，神经自适应音乐反馈可能提升人与人之间的同步水平，这通过EEG相位锁定值的显著增加得以体现。此外，实时同步性测量被成功验证，音乐神经反馈总体上受到参与者好评。但由于样本量较小，仍需进一步研究以得出确定性结论。本研究为创造能够听觉化反映个体间同步水平的音乐奠定了基础。