Thesis Presentation
description
Transcript of Thesis Presentation
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Sound, Space, and Structure
Designing a System for Sound Spatialization
Song Yang
University of Toronto
April 5th, 2013
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outline
what is sound spatialization?
what are some existing sound spatialization systems?
why is my system meaningful?
how does my system achieve spatialization?
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introduction
sound spatialization : the simulation of point
sound sources and their movements
possible applications :
gaming (immersive RPGs)
film & home theatre
many more...
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analog sound spatialization (pre-1980s)
R. Maconie, Tuning In: A Film About Karlheinz Stockhausen,
[Video recording]. London, United Kingdom:
British Broadcasting Corporation, 1981.
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digital sound spatialization (1980s present)
Institute of Sonology
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digital sound spatialization (1980s present)
CIRMMT @ McGill
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gap objectives
design a household sound
spatialization system...
I. intuitive
II. flexible
III. simulates distance
IV. simulates direction (in 3-D)
V. minimal hardware requirements
modern sound spatialization
systems...
+ flexible
+ simulates distance
+ simulates direction (in 3-D)
- computationally expensive
- requires specialized equipment
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system overview
simulation of
directionality
simulation of
distance
path definition
trajectory
generation
input
output
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module I : trajectory generation
A.R. Forrest, Interactive Interpolation and
Approximation by Bzier Polynomials, The
Computer Journal, vol. 15, no. 1, pp. 71-79.
how to communicate spatial
trajectories to the computer?
cartesian/polar coordinates?
I. intuitive
II. flexible
III. simulates distance
IV. simulates direction
V. minimal hardware
bzier curves!
y(x) = x3 +3x2 2x + 5
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module II : simulation of distance
M. Schroeder and B. Logan, Colorless Artificial
Reverberation, Journal of the Audio Engineering
Society, vol. 9, pp. 192-197.
I. intuitive
II. flexible
III. simulates distance
IV. simulates direction
V. minimal hardware distance of illusory sound source:
direct signal vs. reverb (echo) signal
model concert hall reverb using:
increasing signal density
decreasing signal amplitude
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module III : simulation of directionality
V. Pulkki, Virtual Sound Source Positioning Using
Vector Base Amplitude Panning, Journal of the Audio
Engineering Society, vol. 45, no. 6, pp. 456-466.
active arc
vector base amplitude panning
I. intuitive
II. flexible
III. simulates distance
IV. simulates direction
V. minimal hardware
direction of illusory sound source:
volumeSpeakerLeft vs. volumeSpeakerRight
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V. Pulkki, Virtual Sound Source Positioning Using
Vector Base Amplitude Panning, Journal of the Audio
Engineering Society, vol. 45, no. 6, pp. 456-466.
active
triangle
module III : simulation of directionality
I. intuitive
II. flexible
III. simulates distance
IV. simulates direction
V. minimal hardware
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summary
an intuitive, flexible sound spatialization system with low
computational/hardware requirements, while maintaining
functionality of complex systems
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Thanks!
Questions?