logarithmic volume control for global soundtray / volume

flixel/system/frontEnds/SoundFrontEnd.hx

@@ -357,10 +357,30 @@ class SoundFrontEnd
 	public function changeVolume(Amount:Float):Void
 	{
 		muted = false;
+		volume = logToLinear(volume);
 		volume += Amount;
+		volume = linearToLog(volume);
 		showSoundTray(Amount > 0);
 	}
 
+	public function linearToLog(x:Float, minValue:Float = 0.001):Float
+	{
+		// Ensure x is between 0 and 1
+		x = Math.max(0, Math.min(1, x));
+
+		// Convert linear scale to logarithmic
+		return Math.exp(Math.log(minValue) * (1 - x));
+	}
+
+	public function logToLinear(x:Float, minValue:Float = 0.001):Float
+	{
+		// Ensure x is between minValue and 1
+		x = Math.max(minValue, Math.min(1, x));
+
+		// Convert logarithmic scale to linear
+		return 1 - (Math.log(x) / Math.log(minValue));
+	}
+
 	/**
 	 * Shows the sound tray if it is enabled.
 	 * @param up Whether or not the volume is increasing.

flixel/system/ui/FlxSoundTray.hx

@@ -157,7 +157,7 @@ class FlxSoundTray extends Sprite
 		y = 0;
 		visible = true;
 		active = true;
-		var globalVolume:Int = Math.round(FlxG.sound.volume * 10);
+		var globalVolume:Int = Math.round(FlxG.sound.logToLinear(FlxG.sound.volume) * 10);
 
 		if (FlxG.sound.muted)
 		{