diff --git a/src/p_buildmap.cpp b/src/p_buildmap.cpp
index 739c515cfd..82a7095717 100644
--- a/src/p_buildmap.cpp
+++ b/src/p_buildmap.cpp
@@ -703,9 +703,10 @@ static int LoadSprites (spritetype *sprites, Xsprite *xsprites, int numsprites,
 			mapthings[count].args[0] = xsprites[i].Data3;
 			// I am totally guessing abount the volume level. 50 seems to be a pretty
 			// typical value for Blood's standard maps, so I assume it's 100-based.
-			mapthings[count].args[1] = xsprites[i].Data4 * 128 / 100;
+			mapthings[count].args[1] = xsprites[i].Data4;
 			mapthings[count].args[2] = xsprites[i].Data1;
 			mapthings[count].args[3] = xsprites[i].Data2;
+			mapthings[count].args[4] = 0;
 			mapthings[count].type = 14065;
 		}
 		else
diff --git a/src/s_advsound.cpp b/src/s_advsound.cpp
index 40bf0f95cb..1ab3558acf 100644
--- a/src/s_advsound.cpp
+++ b/src/s_advsound.cpp
@@ -1975,7 +1975,7 @@ void AAmbientSound::Tick ()
 		// The second argument scales the ambient sound's volume.
 		// 0 and 128 are normal volume. The maximum volume level
 		// possible is always 1.
-		float volscale = args[1] == 0 ? 1 : args[1] / 128.f;
+		float volscale = args[1] == 0 ? 1 : args[1] / 100.f;
 		float usevol = clamp(ambient->volume * volscale, 0.f, 1.f);
 
 		// The third argument is the minimum distance for audible fading, and
@@ -1988,7 +1988,14 @@ void AAmbientSound::Tick ()
 		}
 		else
 		{
-			S_SoundMinMaxDist(this, CHAN_BODY | loop, ambient->sound, usevol, float(args[2]), float(args[3]));
+			float min = float(args[2]), max = float(args[3]);
+			// The fifth argument acts as a scalar for the preceding two, if it's non-zero.
+			if (args[4] != 0)
+			{
+				min *= args[4];
+				max *= args[4];
+			}
+			S_SoundMinMaxDist(this, CHAN_BODY | loop, ambient->sound, usevol, min, max);
 		}
 		if (!loop)
 		{