Slowly fade audio's pitch on key press?

Question

I have a really basic script for a vehicles engine sound; when you're idle, the vehicle will player a lower pitched sound, and when you're moving (pressing "W") it will play a higher pitched sound. I haven't scripted much audio in the past, and at the moment, the change is too sudden. How can I fade the pitch from the lower to high, and vice versa?

 function Update () 
 {
     if(Input.GetKeyDown(KeyCode.W))
     {
         audio.pitch = 0.85;
     }
     
     if(Input.GetKeyUp(KeyCode.W))
     {
         audio.pitch = 0.7;
     }
 
 }

Answer 1

Wiki

Answer by Jamora · Jul 15, 2013 at 12:17 PM

Lerp the value in a coroutine.

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Answer 2

Answer by fafase · Jul 15, 2013 at 12:18 PM

You need to fade in and out with Time.

 var onlyOnce:boolean = true;
 
 function Update () 
 {
     if(Input.GetKeyDown(KeyCode.W) && onlyOnce)
     {
        onlyOnce = false;
        FadeOut(0.85f);
     }
  
     if(Input.GetKeyUp(KeyCode.W))
     {
        onlyOnce = false;
        FadeOut(0.7f);
     }
 }
 
 function FadeOut(volume:float){
    float vol = volume;
    while(audio.volume > vol){
       audio.volume -= Time.deltaTime;
       yield;
    }
    onlyOnce = true;
 }

You press the button and if you have not a coroutine already running (onlyOnce) you call the coroutine. Then it decreases the audio with deltaTime, you can add a speed in the coroutine, the first parameter is the value you want to reach.

Once the value is reaced, onlyOnce is true again, you can do new calls.

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PanGames · Jul 15, 2013 at 01:51 PM 0

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This seems to be about the audio's volume, but thanks for the reply. I've figured out a way to do it now.

fafase · Jul 15, 2013 at 01:53 PM 0

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oh, well, change volume for pitch.

Answer 3

Answer by PanGames · Jul 15, 2013 at 02:03 PM

I've figured it out now. Not sure if it's the most efficient way of doing things, but hey, it's Java.

 function Update () 
 {
     if(Input.GetKey(KeyCode.W))
     {
         audio.pitch += 0.01;
             if(audio.pitch >= 0.85)
             {
                 audio.pitch = 0.85;
             }
     }
     
     if(Input.GetKey(KeyCode.W) == false)
     {
         audio.pitch -= 0.01;
             if(audio.pitch <= 0.45)
             {
                 audio.pitch = 0.45;
             }
     }
 
 }

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Slowly fade audio's pitch on key press?

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