Patch for Unity3D MasterAudio v3.3.6 producing all sound variations when PlaySound*AndForget() methods used (more makePlaySoundResult use needed). Diff looks much larger than it actually is due to added indentation needed.

MasterAudio.cs.patch

diff --git "a/C:\\Users\\User\\AppData\\Local\\Temp\\TortoiseGit\\MasEC0A.tmp\\MasterAudio-b3070d8-left.cs" "b/C:\\Users\\User\\Dev\\Unity3D\\MusicExperiments\\Assets\\DarkTonic\\MasterAudio\\Scripts\\Singleton\\MasterAudio.cs"
index 4d6ccf1..c9b20e9 100644
--- "a/C:\\Users\\User\\AppData\\Local\\Temp\\TortoiseGit\\MasEC0A.tmp\\MasterAudio-b3070d8-left.cs"
+++ "b/C:\\Users\\User\\Dev\\Unity3D\\MusicExperiments\\Assets\\DarkTonic\\MasterAudio\\Scripts\\Singleton\\MasterAudio.cs"
@@ -1092,62 +1092,67 @@ public class MasterAudio : MonoBehaviour {
 		
 		do {
 			playedState = PlaySoundIfAvailable(randomSource, sourcePosition, volumePercentage, pitch, _group, sourceTrans, attachToSource, delaySoundTime, useVector3, makePlaySoundResult);
-			
-			if (playedState != null && (playedState.SoundPlayed || playedState.SoundScheduled)) {
-				playedSound = true;
-	
-				if (isNonSpecific && randomIndex.HasValue) { // only if successfully played!
-					choices.RemoveAt(randomIndex.Value);			
-					
-					if (choices.Count == 0) {
-						LogIfLoggingEnabled("Reloading sound: " + sType, sType);
+
+			if (makePlaySoundResult) {
+				if (playedState != null && (playedState.SoundPlayed || playedState.SoundScheduled)) {
+					playedSound = true;
+		
+					if (isNonSpecific && randomIndex.HasValue) { // only if successfully played!
+						choices.RemoveAt(randomIndex.Value);			
 						
-						RefillSoundGroupPool(sType);
-					}
-				} 
+						if (choices.Count == 0) {
+							LogIfLoggingEnabled("Reloading sound: " + sType, sType);
+							
+							RefillSoundGroupPool(sType);
+						}
+					} 
 
-				if (_group._group.curVariationSequence == MasterAudioGroup.VariationSequence.TopToBottom && _group._group.useInactivePeriodPoolRefill) {
-					UpdateRefillTime(sType, _group._group.inactivePeriodSeconds);
-				}
-			} else if (isNonSpecific) {
-				// try the other ones
-				if (otherChoices.Count > 0) {
-					randomSource = sources[otherChoices[0]];
-					LogIfLoggingEnabled("Child was busy. Cueing child {" + sources[otherChoices[0]].source.name + "} of " + sType, sType);
-					otherChoices.RemoveAt(0);
+					if (_group._group.curVariationSequence == MasterAudioGroup.VariationSequence.TopToBottom && _group._group.useInactivePeriodPoolRefill) {
+						UpdateRefillTime(sType, _group._group.inactivePeriodSeconds);
+					}
+				} else if (isNonSpecific) {
+					// try the other ones
+					if (otherChoices.Count > 0) {
+						randomSource = sources[otherChoices[0]];
+						LogIfLoggingEnabled("Child was busy. Cueing child {" + sources[otherChoices[0]].source.name + "} of " + sType, sType);
+						otherChoices.RemoveAt(0);
+					}
 				}
+			} else {
+				playedSound = true; // assume success (TODO: Indent above)
 			}
 		}
 		while (!playedSound && otherChoices.Count > 0); // repeat until you've either played the sound or exhausted all possibilities.
 		
-		
-		if (playedState != null) {
-			if (playedState.SoundPlayed) {
-				// sound play worked! Duck music if a ducking sound.
-				var matchingDuck = ma.musicDuckingSounds.Find(delegate(DuckGroupInfo obj) {
-					return obj.soundType == sType;
-				});
-				
-				if (ma.EnableMusicDucking && matchingDuck != null) {
-					// duck music
-					var duckLength = randomSource.source.audio.clip.length;
-					var duckPitch = randomSource.source.pitch;
+		if (makePlaySoundResult) {
+			if (playedState != null) {
+				if (playedState.SoundPlayed) {
+					// sound play worked! Duck music if a ducking sound.
+					var matchingDuck = ma.musicDuckingSounds.Find(delegate(DuckGroupInfo obj) {
+						return obj.soundType == sType;
+					});
 					
-					var pcs = PlaylistController.Instances;
-					for (var i = 0; i < pcs.Count; i++) {
-						pcs[i].DuckMusicForTime(duckLength, duckPitch, matchingDuck.riseVolStart);
+					if (ma.EnableMusicDucking && matchingDuck != null) {
+						// duck music
+						var duckLength = randomSource.source.audio.clip.length;
+						var duckPitch = randomSource.source.pitch;
+						
+						var pcs = PlaylistController.Instances;
+						for (var i = 0; i < pcs.Count; i++) {
+							pcs[i].DuckMusicForTime(duckLength, duckPitch, matchingDuck.riseVolStart);
+						}
+						
+						if (pcs.Count == 0) {
+							Debug.LogWarning("Playlist Controller is not in the Scene. Cannot duck music.");
+						}
 					}
 					
-					if (pcs.Count == 0) {
-						Debug.LogWarning("Playlist Controller is not in the Scene. Cannot duck music.");
-					}
+					return playedState;
+				}
+			} else {
+				if (otherChoices.Count == 0) {
+					LogIfLoggingEnabled("All children of " + sType + " were busy. Will not play this sound for this instance.", sType);
 				}
-				
-				return playedState;
-			}
-		} else {
-			if (playedState == null && otherChoices.Count == 0) {
-				LogIfLoggingEnabled("All children of " + sType + " were busy. Will not play this sound for this instance.", sType);
 			}
 		}