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sound sustain decay
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Sustain


 

Once a sound has reached its peak, the length of time that the sound will sustain is dependent upon the energy from the source vibrations. When the source sound stops, the sound will began to decay. 

Manipulating the sustain time of a sound is yet another way of either modifying a sound or create a totally new one. 

EX:-  The sound of an elevator starting, running, and stopping, all completes within 25 seconds, but the script demands a scene to be played in an elevator that runs for 60 seconds. Editing the sustain portion and making it into a loop would solve the purpose. 

 

Decay


The decrease in amplitude when a vibrating force has been removed is called decay.  The actual time it takes for a sound to diminish to silence is the decay time.  How gradual this sound decays is its rate of decay

Listening to a sound tells if it is... 

o    Indoors (small enclosed area with a great deal of absorbency)

- Little decay and with very little or no reverberation 

o    outdoors (open unconfined area)

- Long decay with an echo 

 

The end of a sound is often referred to as the "tail" of a sound, and conversely, the beginning of a sound is its "head" 

 

 

 

"Record and playback component":

Speed



By increasing or decreasing the playback speed the properties of a sound

 effect can be changed.  

When played at twice as fast as the recorded speed. 

o    a explosion will sound like a gunshot

o    a voice will sound like the cartoon chipmunk character