Use the framework provided GlobalInterruptEnable() function instead of the AVR8/XMEGA specific sei() macro, for future demo/project portability.

Demos/Device/LowLevel/AudioInput/AudioInput.c

@@ -51,7 +51,7 @@ int main(void)
 	SetupHardware();
 
 	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
-	sei();
+	GlobalInterruptEnable();
 
 	for (;;)
 	{

Demos/Device/LowLevel/AudioOutput/AudioOutput.c

@@ -51,7 +51,7 @@ int main(void)
 	SetupHardware();
 
 	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
-	sei();
+	GlobalInterruptEnable();
 
 	for (;;)
 	{

Demos/Device/LowLevel/DualVirtualSerial/DualVirtualSerial.c

@@ -71,7 +71,7 @@ int main(void)
 	SetupHardware();
 
 	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
-	sei();
+	GlobalInterruptEnable();
 
 	for (;;)
 	{

Demos/Device/LowLevel/GenericHID/GenericHID.c

@@ -45,7 +45,7 @@ int main(void)
 	SetupHardware();
 
 	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
-	sei();
+	GlobalInterruptEnable();
 
 	for (;;)
 	{

Demos/Device/LowLevel/Joystick/Joystick.c

@@ -44,7 +44,7 @@ int main(void)
 	SetupHardware();
 
 	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
-	sei();
+	GlobalInterruptEnable();
 
 	for (;;)
 	{

Demos/Device/LowLevel/Keyboard/Keyboard.c

@@ -62,7 +62,7 @@ int main(void)
 	SetupHardware();
 
 	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
-	sei();
+	GlobalInterruptEnable();
 
 	for (;;)
 	{

Demos/Device/LowLevel/KeyboardMouse/KeyboardMouse.c

@@ -52,7 +52,7 @@ int main(void)
 	SetupHardware();
 
 	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
-	sei();
+	GlobalInterruptEnable();
 
 	for (;;)
 	{

Demos/Device/LowLevel/MIDI/MIDI.c

@@ -44,7 +44,7 @@ int main(void)
 	SetupHardware();
 
 	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
-	sei();
+	GlobalInterruptEnable();
 
 	for (;;)
 	{

Demos/Device/LowLevel/MassStorage/MassStorage.c

@@ -55,7 +55,7 @@ int main(void)
 	SetupHardware();
 
 	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
-	sei();
+	GlobalInterruptEnable();
 
 	for (;;)
 	{

Demos/Device/LowLevel/Mouse/Mouse.c

@@ -61,7 +61,7 @@ int main(void)
 	SetupHardware();
 
 	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
-	sei();
+	GlobalInterruptEnable();
 
 	for (;;)
 	{

Demos/Device/LowLevel/RNDISEthernet/RNDISEthernet.c

@@ -48,7 +48,7 @@ int main(void)
 	Webserver_Init();
 
 	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
-	sei();
+	GlobalInterruptEnable();
 
 	for (;;)
 	{

Demos/Device/LowLevel/VirtualSerial/VirtualSerial.c

@@ -58,7 +58,7 @@ int main(void)
 	SetupHardware();
 
 	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
-	sei();
+	GlobalInterruptEnable();
 
 	for (;;)
 	{