went back to exponential level changes due to problems with consisten…

…t behavior of linear gain changes, see phetsims/tambo#61, phetsims/john-travoltage#329, #159, and phetsims/resistance-in-a-wire#205
phetsims · Apr 8, 2019 · e15b1b9 · e15b1b9
1 parent 60ec254
commit e15b1b9
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Showing 2 changed files with 5 additions and 5 deletions.
diff --git a/js/friction/view/BookRubSoundGenerator.js b/js/friction/view/BookRubSoundGenerator.js
@@ -95,13 +95,13 @@ define( function( require ) {
 
           // set the output level based on the velocity of the book
           const noiseAmplitude = options.maxOutputLevel * Math.pow( normalizedVelocity, 0.5 );
-          this.setOutputLevel( noiseAmplitude, 0.1 );
+          this.setOutputLevel( noiseAmplitude, 0.02 );
         }
         else {
           if ( this.isPlaying ) {
             this.stop( this.audioContext.currentTime + STOP_DURATION );
           }
-          this.setOutputLevel( 0, STOP_DURATION );
+          this.setOutputLevel( 0, 0.02 );
         }
       }
     );

diff --git a/js/friction/view/CoolingSoundGenerator.js b/js/friction/view/CoolingSoundGenerator.js
@@ -39,7 +39,7 @@ define( function( require ) {
 
     // start the noise generator - it will remain on and the output level will be controlled by the code below
     this.start();
-    this.setOutputLevel( 0 );
+    this.setOutputLevel( 0, 0 );
 
     // @private {number} - max output level, used in the step function that updates the sound output level
     this.maxOutputLevel = options.maxOutputLevel;
@@ -117,12 +117,12 @@ define( function( require ) {
           }
 
           // set the output level using an empirically determined time constant such that changes sound smooth
-          this.setOutputLevel( targetOutputLevel, 0.2 );
+          this.setOutputLevel( targetOutputLevel, 0.07 );
         }
         else {
 
           // stop the noise generator in a way that fades rapidly but not TOO abruptly
-          this.setOutputLevel( targetOutputLevel, 0.5 );
+          this.setOutputLevel( targetOutputLevel, 0.2 );
           this.stop( this.audioContext.currentTime + 0.01 );
         }
       }