diff --git a/examples/gain.pd b/examples/gain.pd
index ab6906d..8d3b097 100644
--- a/examples/gain.pd
+++ b/examples/gain.pd
@@ -1,106 +1,108 @@
-#N canvas 2220 331 805 580 12;
-#X obj 112 43 adc~ 1 2 3 4 5 6, f 47;
-#X obj 113 281 dac~ 1 2 3 4 5 6, f 47;
-#X obj 112 127 *~ 1;
-#X obj 137 94 r K1;
-#X obj 178 126 *~ 1;
-#X obj 242 128 *~ 1;
-#X obj 308 127 *~ 1;
-#X obj 372 127 *~ 1;
-#X obj 438 126 *~ 1;
-#X obj 203 93 r K2;
-#X obj 267 93 r K3;
-#X obj 333 94 r K4;
-#X obj 397 93 r K5;
-#X obj 463 93 r K6;
-#X obj 290 502 print toVCV;
-#X msg 267 315 L3 \$1 0 0;
-#X msg 333 347 L4 \$1 0 0;
-#X msg 463 348 L6 \$1 0 0;
-#X msg 136 314 L1 \$1 0 0;
-#X msg 203 346 L2 \$1 0 0;
-#X msg 397 317 L5 \$1 0 0;
-#X obj 112 230 *~ 1;
-#X obj 178 229 *~ 1;
-#X obj 242 231 *~ 1;
-#X obj 308 230 *~ 1;
-#X obj 372 230 *~ 1;
-#X obj 438 229 *~ 1;
-#X obj 147 158 r S1;
-#X obj 213 157 r S2;
-#X obj 277 157 r S3;
-#X obj 343 158 r S4;
-#X obj 407 157 r S5;
-#X obj 473 158 r S6;
-#X obj 473 197 - 1;
-#X obj 407 196 - 1;
-#X obj 343 194 - 1;
-#X obj 277 195 - 1;
-#X obj 213 196 - 1;
-#X obj 147 195 - 1;
-#X msg 146 404 S1 \$1 0 0;
-#X msg 213 436 S2 \$1 0 0;
-#X msg 277 405 S3 \$1 0 0;
-#X msg 343 438 S4 \$1 0 0;
-#X msg 407 407 S5 \$1 0 0;
-#X msg 473 437 S6 \$1 0 0;
+#N canvas 1187 297 729 742 12;
+#X obj 153 257 adc~ 1 2 3 4 5 6, f 47;
+#X obj 153 427 dac~ 1 2 3 4 5 6, f 47;
+#X obj 154 297 *~ 1;
+#X obj 218 296 *~ 1;
+#X obj 282 298 *~ 1;
+#X obj 348 297 *~ 1;
+#X obj 412 297 *~ 1;
+#X obj 478 296 *~ 1;
+#X obj 330 663 print toVCV;
+#X msg 307 476 L3 \$1 0 0;
+#X msg 373 508 L4 \$1 0 0;
+#X msg 503 509 L6 \$1 0 0;
+#X msg 176 475 L1 \$1 0 0;
+#X msg 243 507 L2 \$1 0 0;
+#X msg 437 478 L5 \$1 0 0;
+#X obj 154 376 *~ 1;
+#X obj 218 375 *~ 1;
+#X obj 282 377 *~ 1;
+#X obj 348 376 *~ 1;
+#X obj 412 376 *~ 1;
+#X obj 478 375 *~ 1;
+#X msg 186 565 S1 \$1 0 0;
+#X msg 253 597 S2 \$1 0 0;
+#X msg 317 566 S3 \$1 0 0;
+#X msg 383 599 S4 \$1 0 0;
+#X msg 447 568 S5 \$1 0 0;
+#X msg 513 598 S6 \$1 0 0;
+#X obj 179 104 r fromVCV;
+#X obj 179 143 route K1 K2 K3 K4 K5 K6, f 56;
+#X obj 188 198 route S1 S2 S3 S4 S5 S6, f 56;
+#X obj 187 341 == 0;
+#X obj 253 342 == 0;
+#X obj 317 341 == 0;
+#X obj 383 340 == 0;
+#X obj 447 342 == 0;
+#X obj 513 343 == 0;
+#X msg 89 622 display \$1 \$2;
+#X obj 80 582 pack f f;
+#X obj 107 526 t b f;
 #X connect 0 0 2 0;
-#X connect 0 1 4 0;
-#X connect 0 2 5 0;
-#X connect 0 3 6 0;
-#X connect 0 4 7 0;
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-#X connect 3 0 2 1;
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-#X connect 11 0 6 1;
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-#X connect 12 0 7 1;
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-#X connect 13 0 8 1;
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-#X connect 15 0 14 0;
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-#X connect 19 0 14 0;
-#X connect 20 0 14 0;
-#X connect 21 0 1 0;
-#X connect 22 0 1 1;
-#X connect 23 0 1 2;
-#X connect 24 0 1 3;
-#X connect 25 0 1 4;
-#X connect 26 0 1 5;
-#X connect 27 0 38 0;
-#X connect 27 0 39 0;
+#X connect 0 1 3 0;
+#X connect 0 2 4 0;
+#X connect 0 3 5 0;
+#X connect 0 4 6 0;
+#X connect 0 5 7 0;
+#X connect 2 0 15 0;
+#X connect 3 0 16 0;
+#X connect 4 0 17 0;
+#X connect 5 0 18 0;
+#X connect 6 0 19 0;
+#X connect 7 0 20 0;
+#X connect 9 0 8 0;
+#X connect 10 0 8 0;
+#X connect 11 0 8 0;
+#X connect 12 0 8 0;
+#X connect 13 0 8 0;
+#X connect 14 0 8 0;
+#X connect 15 0 1 0;
+#X connect 16 0 1 1;
+#X connect 17 0 1 2;
+#X connect 18 0 1 3;
+#X connect 19 0 1 4;
+#X connect 20 0 1 5;
+#X connect 21 0 8 0;
+#X connect 22 0 8 0;
+#X connect 23 0 8 0;
+#X connect 24 0 8 0;
+#X connect 25 0 8 0;
+#X connect 26 0 8 0;
+#X connect 27 0 28 0;
+#X connect 28 0 2 1;
+#X connect 28 0 12 0;
 #X connect 28 0 37 0;
-#X connect 28 0 40 0;
-#X connect 29 0 36 0;
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+#X connect 28 1 13 0;
+#X connect 28 1 38 0;
+#X connect 28 2 4 1;
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+#X connect 29 4 34 0;
+#X connect 29 4 25 0;
+#X connect 29 5 35 0;
+#X connect 29 5 26 0;
+#X connect 30 0 15 1;
+#X connect 31 0 16 1;
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diff --git a/src/LibPDEngine.cpp b/src/LibPDEngine.cpp
index ec06e9b..4f98972 100644
--- a/src/LibPDEngine.cpp
+++ b/src/LibPDEngine.cpp
@@ -11,6 +11,8 @@ using namespace rack;
 
 float g_lights[NUM_ROWS][3] = {};
 float g_switchLights[NUM_ROWS][3] = {};
+std::string g_utility[2] = {};
+bool g_display_is_valid = false;
 
 std::vector<std::string> split (const std::string &s, char delim) {
     std::vector<std::string> result;
@@ -52,6 +54,7 @@ struct LibPDEngine : ScriptEngine {
   	float _input[BUFFERSIZE] = {};//  = (float*)malloc(1024*2*sizeof(float));
   	const static std::map<std::string, int> _light_map;
   	const static std::map<std::string, int> _switchLight_map;
+  	const static std::map<std::string, int> _utility_map;
 
 	std::string getEngineName() override {
 		return "Pure Data";
@@ -131,6 +134,11 @@ struct LibPDEngine : ScriptEngine {
 				sendSwitch(i, block->switches[i]);
 			}
 		}
+
+		// display
+		if(g_display_is_valid){
+			display(g_utility[1]);
+		}
 		// process samples in libpd
 		_ticks = 1;
 		libpd_process_float(_ticks, _input, _output);
@@ -158,7 +166,7 @@ void LibPDEngine::receiveLights(const char *s) {
 	std::vector<std::string> atoms = split (str, ' ');
 
 	if(atoms[0]=="toVCV:"){
-		// light list
+		// parse lights list
 		bool light_is_valid = true;
 		int light_idx = -1;
 		try {
@@ -177,7 +185,7 @@ void LibPDEngine::receiveLights(const char *s) {
 		else {
 			// error
 		}
-
+		// parse switch lights list
 		bool switchLight_is_valid = true;
 		int switchLight_idx = -1;
 		try {
@@ -196,9 +204,34 @@ void LibPDEngine::receiveLights(const char *s) {
 		else {
 			// error
 		}
+
+		// parse switch lights list
+		bool utility_is_valid = true;
+		int utility_idx = -1;
+		try {
+				utility_idx = _utility_map.at(atoms[1]);      // map::at throws an out-of-range
+			}
+		catch (const std::out_of_range& oor) {
+			utility_is_valid = false;
+			//g_display_is_valid = true;
+			//display("Warning:"+atoms[1]+" not found!");
+		}
+		//std::cout << v[1] << ", " << g_led_map[v[1]] << std::endl;
+		if(utility_is_valid && atoms.size()>=3){
+			g_utility[0] = atoms[1]; // display
+			g_utility[1] = {""}; 
+			for(int i=0; i<atoms.size()-2; i++){
+				g_utility[1] += " " +atoms[i+2]; // concatenate message
+			}
+			g_display_is_valid = true;
+		}
+		else {
+			// error
+		}
 	}
 	else { 
-		// do nothing
+		// print out on command line
+		std::cout << std::string(s) << std::endl;
 	}
 }
 
@@ -238,14 +271,23 @@ const std::map<std::string, int> LibPDEngine::_switchLight_map{
  	{ "S6", 5 }
 };
 
+const std::map<std::string, int> LibPDEngine::_utility_map{
+	{ "display", 0 }
+};
+
+
 void LibPDEngine::sendKnob(const int idx, const float value){
 	std::string knob = "K"+std::to_string(idx+1);
-	libpd_float(knob.c_str(), value);
+	libpd_start_message(1);
+    libpd_add_float(value); 
+    libpd_finish_message("fromVCV", knob.c_str());
 }
 
 void LibPDEngine::sendSwitch(const int idx, const bool value){
 	std::string sw = "S"+std::to_string(idx+1);
-	libpd_float(sw.c_str(), value);
+	libpd_start_message(1);
+    libpd_add_float(value); 
+    libpd_finish_message("fromVCV", sw.c_str());
 }
 
 void LibPDEngine::sendInitialStates(const ProcessBlock* block){