BASIC PRINCIPLES OF NETWORKED MUSIC PERFORMANCE

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Presentation at the 132nd Audio Engineering Society Convention in Budapest. The lecture was held during the Distributed Music Workshop with Alexander Carôt, Nathan Brock, Andrea Szigetvári, David Willyard and Karl Steinberg.

April 27th, 2012

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BASIC PRINCIPLES OF NETWORKED MUSIC PERFORMANCE

  1. 1. BASIC PRINCIPLES OF NETWORKED MUSIC PERFORMANCE 132nd AES Convention - Budapest Álvaro BarbosaResearch Center for Science and Technology of the Arts CITAR (UCP–Porto, Portugal) Work developed at:
  2. 2. Background on Network Collaborative Practices 10 years ago - Stanford-Mcgill 2002 (4.076 Km)
  3. 3. Background on Network Collaborative Practices Stanford-Mcgill 2002 – Discovery Channel
  4. 4. Background on Network Collaborative Practices Stanford-Mcgill 2002 (wath really ahapenned)
  5. 5. Background on Network Music Performance Latency and Networked Music In a vocal conversation it is possible to maintain it even with one-way delays of up to 500 ms. Holub, J., Kastner, M., Tomiska, O. 2007 In order to maintain a synchronized and smooth musical interaction reduces drastically to the order of tens of milliseconds. Schuett, N. 2002 Chafe C., Gurevich M, 2004 Lago, N and Kon, F. 2004 Barbosa, A., Carôt, A. 2005 Chew, E., Sawchuk, A., Tanoue, C., and Zimmermann, R. 2005 Bartlette, C., Headlam, D., Bocko, M., Velikic, G. 2006 Farner, S., Solvang, A., Sæbo, A., Svensson, U. P. 2009 Chafe, C., Cáceres, J-P., Gurevich, M., 2010
  6. 6. Background on Network Music Performance Latency and Networked Music For the Human ear to perceive the order of two simultaneous sounds, they should not be displaced in time over 20ms (Hirsh, 1959) A difficulty in discerning the order of sounds events ê hard to maintain a synchronous musical interaction.
  7. 7. Background on Network Music Performance Latency and Networked Music The ability to perform music synchronously is strongly dependent on: •  The music expressive qualities (Dynamics and Articulation) •  The music style (rhythm, melody, harmony) •  The music perceptual qualities (pitch, texture, timbre) •  The music structure/form •  The musician’s experience and practicing strategies •  Complementary feed-back modalities (visual, tactile) •  The listening conditions
  8. 8. Background on Network Music Performance Barbosa, A. 2003. “Displaced Soundscapes: A Survey of Network Systems for Music and Sonic Art Creation” Leonardo Music Journal 13, pp. 53-59 - MIT Press, Cambridge; doi:10.1162/096112104322750791).
  9. 9. Background on Network Music Performance Latency and Networked MusicBasic Principles for Shared Sonic Environments(1) Digital Control Interface (software or tangible)(2) Local Synthesis & Transmission of Control Data(3) Peer-To-Peer Communication(4) Behavior Driven Interaction (Loose Coupling)(5) Latency Adaptive Dynamics
  10. 10. Background on Network Music Performance Latency and Networked Music Examples Shared Sonic Environments PUBLIC SOUND OBJECTS THE HORGIE: COLLABORATIVE by Álvaro Barbosa ONLINE SYNTHESIZER by Jorge Herrera
  11. 11. Background on Network Music Performance Latency and Networked Music Basic Principles for Remote Performance(1) Ensemble Performance Threshold (EPT)(2) Echo Feed-Back (Self Delay)(3) Inverse Proportion to Tempo(4) Reverb and Complementary Modalities(5) Slow Attack Times
  12. 12. The Influence of Attack Times in NMP (6) ANTIPHONY Technique of alternate or responsive singing by a choir in two separate sections. Each section sings alternate musical phrases Or POLYCHORAL ANTIPHONY (AKA Venetian polychoral style) When two or more groups of singers sing in alternation. Origin in the late Renaissance and early Baroque Can this Technique improve network latency tolerance?
  13. 13. Thank You!!!!abarbosa@porto.ucp.pt | http://www.abarbosa.org

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