How to make sound fade in/out based on distance

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#1

How to make sound fade in/out based on the distance from the source of the sound maybe like a club in a game and if you get further the music volume will get lower

#2

To calculate the volume level needed based on how far away an object is from the player, follow the following steps:

(player = player listening to the sound, and ball = object making sound)

  1. Find the XY difference
var diffX = Math.abs(player.x-ball.x);
var diffY = Math.abs(player.y-ball.y);
  1. Using the XY difference, you can find the distance from the player to the ball using the pythagorean theorem.
var distance = Math.sqrt( Math.pow(diffX,2) + Math.pow(diffY,2) )
  1. Now that we know the distance you’ll need to get a value for the volume. The farther the distance, the smaller you want the volume to be. There are two ways you could do this.
  • Mathod 1: Create a variable for the maximum volume and subtract from it the distance
var max = project.width/2; // Adjust the max if necessary
var volume = Math.max(max-distance,0);
  • Method 2: You can divide 1 by the distance. The greater the distance, the shorter the volume.
var num1 = 1; // Increase the 1 if necessary
var volume = 10000*(1/distance);

Here’s an example project:
test.wick (2.3 KB)
I didn’t have a volume asset to test with, but I did create a volume variable that increases/ decreases slowly based on the distance.

Next, you can use code from Jovanny’s music player project to control/ set the volume of your sound assets based on the distance two objects are apart (you should also use Math.min to set a limit on the volume).

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