Make the dB scale option 0 instead of the linear scale

mkxp.json

@@ -468,14 +468,14 @@
     // "YJITEnable": false,
 
     // Determines how the volume value of a sound affects how loud the sound is.
-    // The stock RPG Maker runtimes use a 35 dB scale for volume (option 1),
+    // The stock RPG Maker runtimes use a 35 dB scale for volume (option 0),
     // but other runtimes might use a different scale.
-    // 0: linear (sound amplitude is multiplied by the volume)
-    // 1: 35 dB (a gain of -0.35 dB is applied to the sound for every percent
+    // 0: 35 dB (a gain of -0.35 dB is applied to the sound for every percent
     //           the volume is set below 100%)
-    // (default: 1)
+    // 1: linear (sound amplitude is multiplied by the volume)
+    // (default: 0)
     //
-    // "volumeScale": 1,
+    // "volumeScale": 0,
 
     // SoundFont to use for midi playback (via fluidsynth)
     // (default: none)

src/audio/al-util.h

@@ -170,20 +170,20 @@ namespace Source
 
 	enum VolumeScale
 	{
-		Linear = 0,
-		Db35 = 1,
+		Db35 = 0,
+		Linear = 1,
 	};
 
 	inline void setVolume(Source::ID id, float value, VolumeScale scale)
 	{
 		switch (scale) {
-			case VolumeScale::Db35:
+			case Linear:
+				break;
+			default:
 				if (value > FLT_EPSILON) {
 					value = std::powf(10.0f, -(35.0f / 20.0f) * (1.0f - value));
 				}
 				break;
-			default:
-				break;
 		}
 		alSourcef(id.al, AL_GAIN, value * 0.8f);
 	}

src/config.cpp

@@ -178,7 +178,7 @@ void Config::read(int argc, char *argv[]) {
         {"dataPathApp", ""},
         {"iconPath", ""},
         {"execName", "Game"},
-        {"volumeScale", 1},
+        {"volumeScale", 0},
         {"midiSoundFont", ""},
         {"midiChorus", false},
         {"midiReverb", false},