audio.PlayOneShot() + Update() = mess?

Question

Hi.

I've been having trouble getting audio.PlayOneShot() to play only once, and not overlap with the same sound each frame, cause Update() is getting called each frame. The thing I want to do is to play a sound once a boolean is true.

Things I've tried:

I created a new boolean variable, and deactivated it after the audio.PlayOneShot() line (if the boolean is true, play a sound, after that line, deactivate it)
I created a boolean function, and play the sound after the "return true;" line
Call it in another (regular void) function (same result, the Update() function is still calling the newly created function each frame),
I have also tried to Invoke() that function.

How could I play a sound when the boolean mentioned in the beginning is turned true?

Answer 1

Best Answer

Answer by DESTRUKTORR · Aug 14, 2012 at 02:48 PM

C# version:

 bool playAudio=false;
 void Update()
 {
     if(playAudio)
     {
         audio.PlayOneShot();
         playAudio=false;
     }
 }

Javascript version:

 var playAudio = false;
 function Update()
 {
     if(playAudio)
     {
         audio.PlayOneShot();
         playAudio=false;
     }
 }

Just add the script that isn't in your file to the appropriate areas.

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LukaKotar · Aug 14, 2012 at 02:52 PM 0

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Looks like when I first tried this, I probably did something wrong. Thanks! Works!

TheVectorHunter · Aug 14, 2012 at 02:55 PM 0

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so you had the answer all along Luka$$anonymous$$otar....

LukaKotar · Aug 14, 2012 at 02:59 PM 0

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@TheVectorHunter Well yeah... If you read the question, you'll see that I mentioned this in it. LOL, I've seen this answer, and I thought: oh well, I guess I'll try it again... ;)

DESTRUKTORR · Aug 14, 2012 at 05:12 PM 0

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I wasn't sure if this was what you meant, but I knew it should work. I'm glad you got it running :) good luck in your future endeavors!

pokequality · May 13, 2019 at 06:35 PM 1

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I'm confused. How would this solution work? Surely the lines inside the 'if' statement would never be called because playAudio would never be set to true?

Sha67 pokequality · Sep 26, 2021 at 05:46 PM 0

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The question has been posted since 2012, so it's very old(even PlayOneShoot method have been changed), I don't know if it was working at that point in time, but logically it doesn't seem to work. Anyway incase someone is looking for a working code :

     public AudioSource audio;
     public AudioClip clip; // make sure to have a reference in the inspector window
     bool playing; // A private boolean with default value set to false
 
     void Start()
     {
         this.audio.clip = clip;
     }
     private void Update()
     {
         if (!this.playing)
         {
             audio.PlayOneShot(clip);
             StartCoroutine(resetPlayingStatus(this.clip.length)); // Starting a coroutine with a float value of clip length
         }
         this.playing = true; // set playing to true after the clip first playing
 
     }
 
     IEnumerator resetPlayingStatus (float clipLength)
     {
         yield return new WaitForSeconds(clipLength); // Make the coroutine waits until the clip is finished
         this.playing = false; // set playing to false, so the clip plays again
     }

Make sure to include using System.Collections; in your script.

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