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The Global Metronome
by Leibniz Universität Hannover, Institut für Kommunikationstechnik - IKT

Our synchronization service is based on the approach of using the Global Positioning System (GPS) to generate a globally shared synchronized time signal which is used as a global metronome within a Networked Music Performance (NMP) [1]. Measurements with our implementation show that by using the GPS signal as a global time reference, extremely accurate time synchronization and audio click generation can be achieved [2]. Several rhythmic experiments with pairs of 23 subjects were performed at IKT. To investigate the effect of the global metronomeon the ensemble accuracy in NMPs we inserted artificial delays (6 ms to 91 ms) into the audio transmission between the pairs of subjects. Each pair had to play a predefined rhythm at separated rooms that where acoustically and visually isolated from each other. The experiments were evaluated in terms of tempo acceleration, imprecision and subjective judgment [3]. 
[1]
Reid Oda and Rebecca Fiebrink, “The Global Metronome: Absolute Tempo Sync for Networked Musical Performance,” Proceedings of the International Conference on New Interfaces for Musical Expression, vol. 16, pp. 26-31, 2016.
[2]
Hupke, R., Beyer, L., Nophut, M., Preihs, S., and Peissig, J., “A Rhythmic Synchronization Service for Music Performances over Distributed Networks,” in Fortschritte der Akustik: DAGA 2019, 45. Jahrestagung für Akustik, Rostock, 2019.
[3]
Hupke, R., Beyer, L., Nophut, M., Preihs, S., and Peissig, “Effect of a GlobalMetronome on Ensemble Accuracy in Networked Music Performance,” Audio Engineering Society Convention 147, Audio Engineering Society, 2019. [Under Review]. 

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c/o Sennheiser electronic GmbH & Co. KG
Spectrum and Innovation
Am Labor 1
30900 Wedemark

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info@lips-project.de

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