PEGASUS: Add new Prehistoric sounds for the DVD demo

engines/pegasus/neighborhood/prehistoric/prehistoric.cpp

@@ -402,9 +402,10 @@ void Prehistoric::loadAmbientLoops() {
 	switch (room) {
 	case kPrehistoric02:
 		// 1/4 volume.
-		if (GameState.getPrehistoricSeenTimeStream())
-			loadLoopSound1("Sounds/Prehistoric/P02SAL00.22k.AIFF", 64);
-		break;
+		if (!GameState.getPrehistoricSeenTimeStream())
+			break;
+
+		// Fall through
 	case kPrehistoric01:
 	case kPrehistoric03:
 	case kPrehistoric04:
@@ -419,7 +420,10 @@ void Prehistoric::loadAmbientLoops() {
 	case kPrehistoric19:
 	case kPrehistoric20:
 		// 1/4 volume.
-		loadLoopSound1("Sounds/Prehistoric/P02SAL00.22k.AIFF", 64);
+		if (_vm->isDVD()) // Updated sound for the DVD version
+			loadLoopSound1("Sounds/Prehistoric/P02SAL00.32k.AIFF", 64);
+		else
+			loadLoopSound1("Sounds/Prehistoric/P02SAL00.22k.AIFF", 64);
 		break;
 	case kPrehistoric08:
 	case kPrehistoric10:
@@ -429,11 +433,17 @@ void Prehistoric::loadAmbientLoops() {
 	case kPrehistoric18:
 	case kPrehistoric21:
 		// 3/16 volume.
-		loadLoopSound1("Sounds/Prehistoric/P02SAL00.22k.AIFF", 48);
+		if (_vm->isDVD()) // Updated sound for the DVD version
+			loadLoopSound1("Sounds/Prehistoric/P02SAL00.32k.AIFF", 48);
+		else
+			loadLoopSound1("Sounds/Prehistoric/P02SAL00.22k.AIFF", 48);
 		break;
 	case kPrehistoric25:
 		// 1/8 volume.
-		loadLoopSound1("Sounds/Prehistoric/P02SAL00.22k.AIFF", 32);
+		if (_vm->isDVD()) // Updated sound for the DVD version
+			loadLoopSound1("Sounds/Prehistoric/P02SAL00.32k.AIFF", 32);
+		else
+			loadLoopSound1("Sounds/Prehistoric/P02SAL00.22k.AIFF", 32);
 		break;
 	case kPrehistoric22:
 	case kPrehistoric22North:
@@ -470,19 +480,29 @@ void Prehistoric::loadAmbientLoops() {
 		break;
 	case kPrehistoric01:
 	case kPrehistoric25:
-		loadLoopSound2("Sounds/Prehistoric/VolcLoop.22K.AIFF", 64);
+		if (_vm->isDVD())
+			loadLoopSound2("Sounds/Prehistoric/VolcLoop.32K.AIFF", 64);
+		else
+			loadLoopSound2("Sounds/Prehistoric/VolcLoop.22K.AIFF", 64);
 		break;
 	case kPrehistoric18:
-		if (_privateFlags.getFlag(kPrehistoricPrivateExtendedBridgeFlag))
-			loadLoopSound2("Sounds/Prehistoric/P18EAL00.22k.AIFF", 0x100, 0, 0);
-		else
+		if (_privateFlags.getFlag(kPrehistoricPrivateExtendedBridgeFlag)) {
+			if (_vm->isDVD()) // Updated sound for the DVD version
+				loadLoopSound2("Sounds/Prehistoric/P18EAL00.44K.aiff", 0x100, 0, 0);
+			else
+				loadLoopSound2("Sounds/Prehistoric/P18EAL00.22k.AIFF", 0x100, 0, 0);
+		} else {
 			loadLoopSound2("");
+		}
 		break;
 	case kPrehistoric23:
 	case kPrehistoric24:
 	case kPrehistoric22:
 	case kPrehistoric22North:
-		loadLoopSound2("Sounds/Prehistoric/P24NAL00.22k.AIFF", 64);
+		if (_vm->isDVD()) // Updated sound for the DVD version
+			loadLoopSound2("Sounds/Prehistoric/P24NAL00.32k.AIFF", 64);
+		else
+			loadLoopSound2("Sounds/Prehistoric/P24NAL00.22k.AIFF", 64);
 		break;
 	}
 }