The SEDRIS Data Representation Model
APPENDIX A - Classes
Fade Range

Class Name: Fade Range

Superclass - <SEDRIS Abstract Base>

Subclasses

This DRM class is concrete and has no subclasses.

Definition

For region-based audio, an instance of this DRM class specifies the range where the audio is attenuated to fade out at the boundary.

Primary Page in DRM Diagram:

Secondary Pages in DRM Diagram:

This class appears on only one page of the DRM class diagram.

Example

  1. Consider a 2D areal region used to represent a localized storm cell. If the listener is within the region, the constant sound of rainfall is to be played. If the listener is outside the region, the rainfall sound is not to be played.

    At the edge of the region, the data provider doesn't want the sound to just turn itself off, but to gradually fade out as the listener gets farther away. So <Fade Range> is attached to the <Sound Instance>, defining the range at which the sound begins fading away and the range at which the sound has completely faded away.

FAQs

No FAQs supplied.

Constraints

None.

Component of (two-way)

Inherited Field Elements

This class has no inherited field elements.

Field Elements

SE_Long_Float fade_to_off_begin; (notes)
SE_Long_Float fade_to_off_complete; (notes)

Notes

Fields Notes


fade_to_off_begin

 This specifies the range (in metres) where the sound begins
 to fade away.

fade_to_off_complete

 This specifies the range (in metres) where the sound has
 completely faded away.

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Last updated: May 15, 2003 Copyright © 2003 SEDRIS™