Sonix

1
Sonix

• VR Juggler Sound Manager

2
Overview

• Why use audio
• Introduction of sonix
• Standalone usage
• VR Juggler application usage
• Goal
• Be able to add sound to VR Juggler applications

3
Audio Introduction

• The benefits of using audio
• Takes no screen space
• Works well with background processes
• Humans process audio in parallel with visual
  information
• Human focus works well
• Audio channel is available.
• Key More immersive

4
Sonix

• Provides simple audio objects for playing sounds
  using one of several audio APIs
• Features
• Simple API
• Short learning curve
• Simple usage, stays out of the way
• Access to spatialized audio and triggering
• Supports features needed for virtual environments
• Spatialized or ambient sounds
• One-shot and looping sounds
• Supports runtime reconfigurability

5
SonixSystem

• System
• Handle
• Sound info
• API plugins

6
Using Sonix

• Basic steps
• Set sound API
• Configure sound info
• Initialize sound handle
• Trigger sound
• Call time step function

7
Using Sonix
include ltsnx/sonix.hgt int main (int argc, char
argv) // Start API (set to OpenAL)
sonixinstance()-gtchangeAPI("OpenAL") //
Setup sound description for our sound
snxSoundInfo si si.filename "sound.wav"
si.datasource snxSoundInfoFILESYSTEM
// Create sound handle object snxSoundHandle
mySound("MySound") mySound.configure(si)
// Trigger the sound mySound.trigger() //
simulate running application while (1)
float time_delta(getTimeChangeInSeconds())
sonixinstance()-gtstep(time_delta)

• Set sound API
• Configure sound info
• Initialize sound handle
• Trigger sound
• Call time step func

8
Using Sonix
include ltsnx/sonix.hgt int main (int argc, char
argv) // Start API (set to OpenAL)
sonixinstance()-gtchangeAPI("OpenAL") //
Setup sound description for our sound
snxSoundInfo si si.filename "sound.wav"
si.datasource snxSoundInfoFILESYSTEM
// Create sound handle object snxSoundHandle
mySound("MySound") mySound.configure(si)
// Trigger the sound mySound.trigger() //
simulate running application while (1)
float time_delta(getTimeChangeInSeconds())
sonixinstance()-gtstep(time_delta)

• Set sound API
• Configure sound info
• Initialize sound handle
• Trigger sound
• Call time step func

9
Using Sonix
include ltsnx/sonix.hgt int main (int argc, char
argv) // Start API (set to OpenAL)
sonixinstance()-gtchangeAPI("OpenAL") //
Setup sound description for our sound
snxSoundInfo si si.filename "sound.wav"
si.datasource snxSoundInfoFILESYSTEM
// Create sound handle object snxSoundHandle
mySound("MySound") mySound.configure(si)
// Trigger the sound mySound.trigger() //
simulate running application while (1)
float time_delta(getTimeChangeInSeconds())
sonixinstance()-gtstep(time_delta)

• Set sound API
• Configure sound info
• Initialize sound handle
• Trigger sound
• Call time step func

10
Using Sonix
include ltsnx/sonix.hgt int main (int argc, char
argv) // Start API (set to OpenAL)
sonixinstance()-gtchangeAPI("OpenAL") //
Setup sound description for our sound
snxSoundInfo si si.filename "sound.wav"
si.datasource snxSoundInfoFILESYSTEM
// Create sound handle object snxSoundHandle
mySound("MySound") mySound.configure(si)
// Trigger the sound mySound.trigger() //
simulate running application while (1)
float time_delta(getTimeChangeInSeconds())
sonixinstance()-gtstep(time_delta)

• Set sound API
• Configure sound info
• Initialize sound handle
• Trigger sound
• Call time step func

11
Using Sonix
include ltsnx/sonix.hgt int main (int argc, char
argv) // Start API (set to OpenAL)
sonixinstance()-gtchangeAPI("OpenAL") //
Setup sound description for our sound
snxSoundInfo si si.filename "sound.wav"
si.datasource snxSoundInfoFILESYSTEM
// Create sound handle object snxSoundHandle
mySound("MySound") mySound.configure(si)
// Trigger the sound mySound.trigger() //
simulate running application while (1)
float time_delta(getTimeChangeInSeconds())
sonixinstance()-gtstep(time_delta)

• Set sound API
• Configure sound info
• Initialize sound handle
• Trigger sound
• Call time step func

12
Reconfiguration

• Example uses
• Change sound API being used
• Disable sounds
• Benefits
• Portability of application
• Enforces decoupling in implementation

13
Reconfiguration example
include ltsnx/sonix.hgt int main (int argc, char
argv) // Start API (set to OpenAL)
sonixinstance()-gtchangeAPI("OpenAL") //
Setup sound description for our sound
snxSoundInfo si si.filename "sound.wav"
si.datasource xnsSoundInfoFILESYSTEM
// Create sound handle object snxSoundHandle
mySound("MySound") mySound.configure(si)
// Trigger the sound mySound.trigger() //
Switch API sonixinstance()-gtchangeAPI(Audiow
orks") // simulate running application
while (1) float time_delta(getTimeChangeInSec
onds()) sonixinstance()-gtstep(time_delta)

• Single call to system controller
• Already used in every application

14
Sound Manager

• Capabilities
• Integrates sonix control with VR Juggler kernel
• User can configure sounds in config file
• Still allows full sonix API, but simplifies
  common usages

15
Configuring Sound Manager
16
Sound Manager Example
class myApp public vrjGlApp void
init() mSound.init(bump)
mButton0.init(VJButton0) void
preFrame() if(mButton0-gtgetData()
gadgetDigitalON) mSound.trigger()
snxSoundHandle mSound
gadgetDigitalInterface mButton0

• Initialize sound handle
• Trigger sound

17
Sound Manager Example
class myApp public vrjGlApp void
init() mSound.init(bump)
mButton0.init(VJButton0) void
preFrame() if(mButton0-gtgetData()
gadgetDigitalON) mSound.trigger()
snxSoundHandle mSound
gadgetDigitalInterface mButton0

• Initialize sound handle
• Trigger sound

18
Demo

• Example of sonix VR Juggler application

19
Thats all there is to it

• Questions???
• Give it a try and let us know what you think
• Documentation
• http//www.vrjuggler.org/sonix/docs.php
• Future work
• Support for more sound APIs
• Great place to contribute to project (hint, hint
  )