Yohei Kobayashi

New ensemble system based on mutual entrainment

Mutual interaction of rhythm is widely observed in the performance between humans. However, one-sided action is dominant in the interaction between human and musical machine. Thus, in this research we try to realize human-like accompaniment system by using mutual interaction between rhythms. To design the model of system, we analysed the performance between human and the constructed system.

Analysis of network ensemble with time lag

In recent years, the ensemble technology between the distant places with the networks has been proposed. The problem of the technology is the affection of the time lag in the networks. The purpose of this study is to clarify the characteristic of the ensembles between the distant humans. We constructed the network ensemble system, which is possible to set the time lag, and analyze the changes in the various kinds of the time lags. From the results, when with the 90 ms or more time lag, the performance fails. Also then with the 50-80 ms time lag, they perform with the differentiation of the roles based on the mutual anticipations.

Development of new ensemble system based on coupled phase oscillator

Mutual interaction of rhythm is widely observed in the music performance between humans. In this study, based on our previous research, we used mutual entrainment model in coupled phase oscillators. We try to construct an ensemble support system to realize such mutual interaction process. As a result, by comparing with direct ensemble between two humans, effectiveness of our new support system is suggested.

Co-creative walking support as music therapy

Mutual adaptation process in musical communication is often used for walking support and rehabilitation. But this kind of supporting system is not realized yet. So the purpose of this research is to construct walking support system as a musical communication process. Our strategy is to extend walk-mate system, which realizes mutual adaptation process between human and virtual walker by exchanging step sound. We replaced this step sound to the music performance and showed the effectiveness in the experiment of walking support. The smoothness of gate cycle was improved in the both music performance condition and step sound condition. But in the music condition, the improvement of smoothness remained after the support walking. This result show the effectiveness of this proposed system as a walking support.