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Rensselaer Polytechnic Institute

Rensselaer Polytechnic Institute. SenSInstallation: Review the use of spherical speaker arrays and sensor-speaker arrays (SenSAs) in performance and installation. Detail our recent development of “third generation” spherical speaker arrays.

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Rensselaer Polytechnic Institute

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  1. Rensselaer Polytechnic Institute

  2. SenSInstallation: Review the use of spherical speaker arrays and sensor-speaker arrays (SenSAs) in performance and installation. Detail our recent development of “third generation” spherical speaker arrays. Project the use of these new speakers as a large-scale diffusion array for sound installation and electro-acoustic performance.

  3. “Alternative Voices for Electronic Sound” Trueman, Bahn, Cook - ICMC 2000, Berlin “Physicality and Feedback” Bahn, Hahn, Trueman - ICMC 2001, Havana

  4. SenSInstallation Project Goals: • Construct a new Sensor/Speaker “instrument:” • Large-scale multi-channel spherical sound system • under sensor control. • Develop the system so that could support many • configurations and applications. • Develop general-purpose spatialization tools for • the system. • Realize numerous pieces ranging from sound installation • to electro-acoustic mixed ensemble compositions.

  5. Spherical Speaker Arrays and “SenSAs:” Background Conventional Systems: • Covered at SEAMUS 2002 by Beck: A Taxonomy of Sound Diffusion • Forward projecting stereo “PA-systems” • Outside-In, “Surround” configurations

  6. Spherical Speaker Arrays and “SenSAs:” Background Conventional Systems: • Surround the audience in order to provide an “immersive” sonic experience. • Disassociate the acoustic source of sound production and the electronic image creating a “plane of separation” between acoustic and electronic sources and between electronic sounds and the audience. • Acoustic sources are absorbed into electronic sound-space, usually via subtle addition of artificial reverberation (sound reinforcement)

  7. Spherical Speaker Arrays and “SenSAs:” Background Spherical Systems: • “Inside-Out,” instrument-like sonic radiation • Engage natural acoustic qualities of performance spaces • No “sweet spot”

  8. Spherical Speaker Arrays and “SenSAs:” Background Spherical Systems: • Electronic sources are absorbed into the acoustic sound-space • Very successful with small chamber music ensembles and in small spaces. • Often successful with larger ensembles, in large spaces, and in combination with traditional sound-reinforcement systems. • No “plane-of-separation” between electronic and acoustic sources.

  9. Spherical Speaker Arrays and “SenSAs:” Background • Spherical speakers have long been applied in the study of • The acoustic qualities of performance spaces: • Hidaka and Beranek, 1991 • The acoustic qualities of instruments: • Causse, et al., 1992 • Roads,1996 • Wessel,1991 L.A.R.S. speaker used in acoustic analysis of concert halls

  10. The “Nbody Project” Cook and Trueman Studies of the directional radiative qualities of acoustic instruments Multi-channel microphone array Software interface to manipulate and apply impulse response analyses

  11. Early Spherical Speakers for the Nbody Project The Bomb The Boulder

  12. Trueman’s first “gigging” sphere “R2” (Ikea salad bowls never sounded better…)

  13. the “critter” 12 discreet channels individually enclosed drivers Designed by Dan and Lawrence Trueman

  14. “Bubba” (Bahn) A 23” 12-channel spherical speaker array based on the “critter” design

  15. Second Generation Spherical Speakers U.S. Enclosures Inc. Fabricated Spheres

  16. Applications:Performance Arrays • Bahn • Trueman • “Interface”

  17. Bahn set-up “The r!g”

  18. Trueman set-ups solo

  19. Trueman set-ups “Trollstilt” Dan Trueman & Monica Mugan Colgate Chapel Electro-Acoustic mixed ensembles: Trollstilt, Machine Language

  20. “interface” on stage at OSU Interactive Performance Series

  21. Applications:Sensor Speaker Arrays: SenSAs • Trueman: BoSSA • Cook: DigitalDoo • Bahn/Hahn: Pikapika

  22. BoSSA Bowed-Sensor-Speaker-Array

  23. Cook’s DigitalDoo: a sensor didgeridoo

  24. Cook’s DigitalDoo: modified spherical speaker

  25. “Pikapika”a Sensor/ Speaker Performer - Tomie Hahn and Curtis Bahn

  26. The “SSpeaPer” Interface

  27. “Strolling:” a wireless sonic performer

  28. Applications:Multi-channel Arrays andSenSAs in Installation • Cook: Perisphere 1 • Moore, Engel, Place: Telephonic Displacements • Moore: Cumulosonus

  29. PariSphere 1 Cook

  30. Multi-channel speaker array for Telephonic Displacements Moore, Engel, Place

  31. Cumulosonus 12 channel/ 48 speaker array - Moore

  32. Third Generation Spherical Speakers • Due to dissatisfaction with United • Enclosures Inc. fabricated spheres, new • speakers returned to a modified “critter” design. • Designed for 2 channel spherical or 1 channel • hemispherical applications • 43 single channel hemispheres produced

  33. Third Generation Spherical Speakers Design and fabrication Jigs created for accurate mass production

  34. Third Generation Spherical Speakers Preparation for painting Sealing the hemispheres

  35. Third Generation Spherical Speakers

  36. Third Generation Spherical Speakers

  37. Third Generation Spherical Speakers

  38. Third Generation Spherical Speakers Installing Polk Audio coaxial drivers.

  39. Initial Tests First configuration:16 channel 4x4 test grid

  40. Initial Tests Currently undergoing rigorous evaluation process…

  41. Initial Tests Surveillance dome for soft VNS head tracking

  42. Initial Software Tests • 4x4 matrix panning based on “equal power curve” function, later Gaussian or “S-curve.” • Arbitrary room size and speaker configuration. • Dynamic placement of sound “objects” within the configuration. • Scalable sound size or “radius.” • Hooks for external control of sound object placement.

  43. Initial Software Tests “Boids,” Eric L. Singer Based on Simon Fraser's implementation of Craig Reynolds' Boids algorithm

  44. Pieces in Progress • “TerraSonus” Moore Installation of a large-scale navigable sonic landscape • “struct_1.cg.0” Trueman/Bahn A “Digital Concerto Grosso” for Electronic Duo and Large Chamber Orchestra

  45. Building new sonic display systems is a very rewarding activity: Speakers constitute our “voice” in electronic music yet we rarely engage them on this level when studying electro-acoustic music composition and performance. This project provides engagement with design, fabrication, acoustics, electronics, programming, and composition. Great class or independent project for students.

  46. No, we’re not selling them... We will provide you with plans and information if you want to build some. Curtis Bahn crb@rpi.edu http://www.arts.rpi.edu/crb Stephan Moore stephan@oddnoise.com http://www.oddnoise.com/

  47. Thanks to the Integrated Electronic Arts Program Rensselaer Polytechnic institute - iEAR Studios. Polk Audio, Inc. Partners in crime: David Lublin, Jonathan Marcus - Undergraduate Research Assistants Scott Smallwood, Dan Trueman, Perry Cook Interface at the Flea Theater in NYC April 15th, EMF series Bahn, Trueman, Cook, Hahn, Dubois

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