Diagnosing Acoustic Latency: Human Perception of Milliseconds
Chris Chafe is a composer, improviser, and cellist, developing much of his music alongside computer-based research. He is Director of Stanford University’s Center for Computer Research in Music and Acoustics (CCRMA). In 2019, he was International Visiting Research Scholar with the Peter Wall Institute for Advanced Studies at The University of British Columbia, Visiting Professor at the Politecnico di Torino, and Edgard-Varèse Guest Professor at the Technical University of Berlin. At IRCAM (Paris) and The Banff Centre (Alberta), he has pursued methods for digital synthesis, music performance, and real-time internet collaboration. CCRMA’s JackTrip project involves live concertizing with musicians the world over.
Chris examines the acoustic-based challenges of discovering synchrony as people co-create through music, dancing, and other ensemble activities. Achieving very low-latency acoustic signals in telecommunication usually requires a trade-off in audio quality. He shows examples of remotely-connected musicians at latencies equivalent to sound transmission within a single room, using JackTrip, an open-source audio streaming technology developed at CCRMA.
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