diff --git a/Makefile b/Makefile
index c0423d9..c677bc0 100644
--- a/Makefile
+++ b/Makefile
@@ -61,5 +61,17 @@ $(duktape):
 # 	$(SHA256) 6.13.0.tar.gz 183beeb3b720bfeab6cc8af12fbec0bf9fef2727684ac79289fd12d0dfee728b
 # 	cd dep && $(UNTAR) ../6.13.0.tar.gz
 
+# # LLVM
+# llvm := dep/lib/libllvm.a
+# DEPS += $(llvm)
+# $(llvm):
+# 	$(WGET) "https://github.com/llvm/llvm-project/releases/download/llvmorg-8.0.1/llvm-8.0.1.src.tar.xz"
+# 	$(SHA256) llvm-8.0.1.src.tar.xz 44787a6d02f7140f145e2250d56c9f849334e11f9ae379827510ed72f12b75e7
+# 	cd dep && $(UNTAR) ../llvm-8.0.1.src.tar.xz
+# 	cd dep/llvm-8.0.1.src && mkdir -p build
+# 	cd dep/llvm-8.0.1.src/build && $(CMAKE) ..
+# 	cd dep/llvm-8.0.1.src/build && $(MAKE)
+# 	cd dep/llvm-8.0.1.src/build && $(MAKE) install
+
 
 include $(RACK_DIR)/plugin.mk
diff --git a/src/Prototype.cpp b/src/Prototype.cpp
index 59f01cb..dc727a6 100644
--- a/src/Prototype.cpp
+++ b/src/Prototype.cpp
@@ -83,6 +83,8 @@ struct Prototype : Module {
 				block.knobs[i] = params[KNOB_PARAMS + i].getValue();
 			for (int i = 0; i < NUM_ROWS; i++)
 				block.switches[i] = params[SWITCH_PARAMS + i].getValue() > 0.f;
+			float oldKnobs[NUM_ROWS];
+			std::memcpy(oldKnobs, block.knobs, sizeof(block.knobs));
 
 			// Run ScriptEngine's process function
 			{
@@ -97,6 +99,11 @@ struct Prototype : Module {
 				}
 			}
 
+			// Params
+			for (int i = 0; i < NUM_ROWS; i++) {
+				if (block.knobs[i] != oldKnobs[i])
+					params[KNOB_PARAMS + i].setValue(block.knobs[i]);
+			}
 			// Lights
 			for (int i = 0; i < NUM_ROWS; i++)
 				for (int c = 0; c < 3; c++)
diff --git a/tests/sandbox.js b/tests/sandbox.js
new file mode 100644
index 0000000..14ce26d
--- /dev/null
+++ b/tests/sandbox.js
@@ -0,0 +1,23 @@
+
+config.frameDivider = 256
+
+var knobPresets = []
+for (var i = 0; i < 6; i++) {
+	knobPresets[i] = [0, 0, 0, 0, 0, 0]
+}
+var lastI = 0
+
+function process(block) {
+	for (var j = 0; j < 6; j++) {
+		knobPresets[lastI][j] = block.knobs[j]
+	}
+	for (var i = 0; i < 6; i++) {
+		if (block.switches[i]) {
+			for (var j = 0; j < 6; j++) {
+				block.knobs[j] = knobPresets[i][j]
+			}
+			lastI = i
+		}
+		block.switchLights[i][0] = (lastI == i) ? 1 : 0
+	}
+}
\ No newline at end of file