diff --git a/vite/src/pipedal/Lv2Plugin.tsx b/vite/src/pipedal/Lv2Plugin.tsx
index 341425f..ebe4165 100644
--- a/vite/src/pipedal/Lv2Plugin.tsx
+++ b/vite/src/pipedal/Lv2Plugin.tsx
@@ -1138,18 +1138,20 @@ export function makeSplitUiPlugin(): UiPlugin {
         has_midi_output: 0,
         description: "",
         controls: [
-            new UiControl().applyProperties({
+            new UiControl().deserialize({
                 symbol: "splitType",
                 name: "Type",
                 index: 0,
                 is_input: true,
                 min_value: 0.0,
                 max_value: 2.0,
+                default_value: 0.0,
+
                 enumeration_property: true,
                 scale_points: [
                     new ScalePoint().deserialize({ value: 0, label: "A/B" }),
-                    new ScalePoint().deserialize({ value: 1, label: "mix" }),
-                    new ScalePoint().deserialize({ value: 1, label: "L/R" }),
+                    new ScalePoint().deserialize({ value: 1, label: "Mix" }),
+                    new ScalePoint().deserialize({ value: 2, label: "L/R" }),
                 ],
                 is_bypass: false,
                 is_program_controller: false,
@@ -1157,84 +1159,97 @@ export function makeSplitUiPlugin(): UiPlugin {
                 connection_optional: false,
 
             }),
-            new UiControl().applyProperties({
+            new UiControl().deserialize({
                 symbol: "select",
                 name: "Select",
                 index: 1,
                 is_input: true,
                 min_value: 0.0,
                 max_value: 1.0,
+                default_value: 0.0,
+
                 enumeration_property: true,
                 scale_points: [
                     new ScalePoint().deserialize({ value: 0, label: "A" }),
                     new ScalePoint().deserialize({ value: 1, label: "B" }),
                 ],
+                controlType: ControlType.ABSwitch,
+
                 is_bypass: false,
                 is_program_controller: false,
                 custom_units: "",
                 connection_optional: false,
 
             }),
-
-            new UiControl().applyProperties({
+            
+            new UiControl().deserialize({
                 symbol: "mix",
                 name: "Mix",
                 index: 2,
                 is_input: true,
                 min_value: -1.0,
                 max_value: 1.0,
+                default_value: 0.0,
+                controlType: ControlType.Dial,
                 is_bypass: false,
                 is_program_controller: false,
                 custom_units: "",
                 connection_optional: false,
 
             }),
-            new UiControl().applyProperties({
+            new UiControl().deserialize({
                 symbol: "panL",
                 name: "Pan Top",
                 index: 3,
                 is_input: true,
                 min_value: -1.0,
                 max_value: 1.0,
+                default_value: 0.0,
+                controlType: ControlType.Dial,
                 is_bypass: false,
                 is_program_controller: false,
                 custom_units: "",
                 connection_optional: false,
 
             }),
-            new UiControl().applyProperties({
+            new UiControl().deserialize({
                 symbol: "volL",
-                name: "Vol Top",
                 index: 4,
                 is_input: true,
                 min_value: -60.0,
                 max_value: 12.0,
+                default_value: 0.0,
                 is_bypass: false,
+                controlType: ControlType.Dial,
                 is_program_controller: false,
                 custom_units: "",
                 connection_optional: false,
 
             }),
-            new UiControl().applyProperties({
+            new UiControl().deserialize({
                 symbol: "panR",
                 name: "Pan Bottom",
                 index: 5,
                 is_input: true,
                 min_value: -1.0,
                 max_value: 1.0,
+                default_value: 0.0,
+                controlType: ControlType.Dial,
                 is_bypass: false,
                 is_program_controller: false,
                 custom_units: "",
                 connection_optional: false,
 
             }),
-            new UiControl().applyProperties({
+            new UiControl().deserialize({
                 symbol: "volR",
                 name: "Vol Bottom",
                 index: 6,
                 is_input: true,
                 min_value: -60.0,
                 max_value: 12.0,
+                default_value: 0.0,
+                controlType: ControlType.Dial,
                 is_bypass: false,
                 is_program_controller: false,
                 custom_units: "",
diff --git a/vite/src/pipedal/Pedalboard.tsx b/vite/src/pipedal/Pedalboard.tsx
index 1012687..fde63cf 100644
--- a/vite/src/pipedal/Pedalboard.tsx
+++ b/vite/src/pipedal/Pedalboard.tsx
@@ -686,9 +686,9 @@ export class Pedalboard implements Deserializable<Pedalboard> {
             new ControlValue(PedalboardSplitItem.SELECT_KEY,0),
             new ControlValue(PedalboardSplitItem.MIX_KEY,0),
             new ControlValue(PedalboardSplitItem.PANL_KEY,0),
-            new ControlValue(PedalboardSplitItem.VOLL_KEY,-3),
+            new ControlValue(PedalboardSplitItem.VOLL_KEY,0),
             new ControlValue(PedalboardSplitItem.PANR_KEY,0),
-            new ControlValue(PedalboardSplitItem.VOLR_KEY,-3)
+            new ControlValue(PedalboardSplitItem.VOLR_KEY,0)
         ];
 
 
diff --git a/vite/src/pipedal/PiPedalModel.tsx b/vite/src/pipedal/PiPedalModel.tsx
index 7f4fd54..0f971c0 100644
--- a/vite/src/pipedal/PiPedalModel.tsx
+++ b/vite/src/pipedal/PiPedalModel.tsx
@@ -1721,11 +1721,19 @@ export class PiPedalModel //implements PiPedalModel
         if (pedalboard === undefined) throw new PiPedalStateError("Pedalboard not ready.");
         let newPedalboard = pedalboard.clone();
 
-        let item = newPedalboard.getItem(instanceId);
+        let item: PedalboardItem = newPedalboard.getItem(instanceId);
 
         let changed = value !== item.isEnabled;
         if (changed) {
             item.isEnabled = value;
+            let pluginInfo: UiPlugin | null = this.getUiPlugin(item.uri);
+            if (pluginInfo !== null) {
+                for (let uiControl of pluginInfo.controls) {
+                    if (uiControl.is_bypass) {
+                        this._setPedalboardControlValue(instanceId, uiControl.symbol, value ? 0.0 : 1.0, false);
+                    }
+                }
+            }
             this.setModelPedalboard(newPedalboard);
             if (notifyServer) {
                 let body: PedalboardItemEnableBody = {
diff --git a/vite/src/pipedal/SplitUiControls.tsx b/vite/src/pipedal/SplitUiControls.tsx
index 4e4b7cd..2171980 100644
--- a/vite/src/pipedal/SplitUiControls.tsx
+++ b/vite/src/pipedal/SplitUiControls.tsx
@@ -27,6 +27,7 @@ export const SplitTypeControl: UiControl = new UiControl().deserialize({
     symbol: PedalboardSplitItem.TYPE_KEY,
     name: "Type",
     index: 0,
+    is_input: true,
     min_value: 0,
     max_value: 2,
     default_value: 0,
@@ -53,6 +54,8 @@ export const SplitAbControl: UiControl = new UiControl().deserialize({
     symbol: PedalboardSplitItem.SELECT_KEY,
     name: "Select",
     index: 1,
+    is_input: true,
+
     min_value: 0,
     max_value: 1,
     default_value: 0,
@@ -78,6 +81,7 @@ export const SplitMixControl: UiControl = new UiControl().deserialize({
     symbol: PedalboardSplitItem.MIX_KEY,
     name: "Mix",
     index: 2,
+    is_input: true,
     min_value: -1,
     max_value: 1,
     default_value: 0,
@@ -99,6 +103,7 @@ export const SplitPanLeftControl: UiControl = new UiControl().deserialize({
     symbol: PedalboardSplitItem.PANL_KEY,
     name: "Pan Top",
     index: 3,
+    is_input: true,
     min_value: -1,
     max_value: 1,
     default_value: 0,
@@ -119,9 +124,10 @@ export const SplitVolLeftControl: UiControl = new UiControl().deserialize({
     symbol: PedalboardSplitItem.VOLL_KEY,
     name: "Vol Top",
     index: 4,
+    is_input: true,
     min_value: -60,
     max_value: 12,
-    default_value: -3,
+    default_value: 0,
     range_steps: 0,
     is_logarithmic: false,
     display_priority: -1,
@@ -146,6 +152,7 @@ export const SplitPanRightControl: UiControl = new UiControl().deserialize({
     symbol: PedalboardSplitItem.PANR_KEY,
     name: "Pan Bottom",
     index: 5,
+    is_input: true,
     min_value: -1,
     max_value: 1,
     default_value: 0,
@@ -166,9 +173,10 @@ export const SplitVolRightControl: UiControl = new UiControl().deserialize({
     symbol: PedalboardSplitItem.VOLR_KEY,
     name: "Vol Bottom",
     index: 6,
+    is_input: true,
     min_value: -60,
     max_value: 12,
-    default_value: -3,
+    default_value: 0,
     range_steps: 0,
     is_logarithmic: false,
     display_priority: -1,