diff --git a/src/App.tsx b/src/App.tsx
index 1e0290b..4e0b2af 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -12,6 +12,8 @@ import {
   Node,
   Edge,
   Connection,
+  ConnectionLineType,
+  ConnectionLineComponent,
 } from '@xyflow/react'
 import '@xyflow/react/dist/style.css'
 import './reactflow-dark.css'
@@ -32,6 +34,39 @@ const nodeTypes = {
   customNode: CustomNode,
 }
 
+const CustomConnectionLine: ConnectionLineComponent = ({
+  fromX,
+  fromY,
+  toX,
+  toY,
+  connectionLineStyle,
+}: {
+  fromX: number
+  fromY: number
+  toX: number
+  toY: number
+  connectionLineStyle?: React.CSSProperties
+}) => {
+  // Calculate midpoint
+  const midX = (fromX + toX) / 2
+  const midY = (fromY + toY) / 2
+
+  // Create a curved path
+  const path = `M${fromX},${fromY} Q${midX},${fromY} ${midX},${midY} T${toX},${toY}`
+
+  return (
+    <g>
+      <path
+        fill="none"
+        stroke={connectionLineStyle?.stroke || '#999'}
+        strokeWidth={connectionLineStyle?.strokeWidth || 2}
+        className="animated"
+        d={path}
+      />
+    </g>
+  )
+}
+
 function AudioDeviceArrangerApp() {
   const {
     devices,
@@ -212,6 +247,8 @@ function AudioDeviceArrangerApp() {
             fitView
             fitViewOptions={{ padding: 0.2, minZoom: 0.5, maxZoom: 2 }}
             className={isDarkMode ? 'dark-flow' : ''}
+            connectionLineType={ConnectionLineType.SmoothStep}
+            connectionLineComponent={CustomConnectionLine}
           >
             <Controls className={isDarkMode ? 'dark-controls' : ''} />
             <MiniMap className={isDarkMode ? 'dark-minimap' : ''} />
diff --git a/src/components/CustomConnectionLine.tsx b/src/components/CustomConnectionLine.tsx
new file mode 100644
index 0000000..bbb6930
--- /dev/null
+++ b/src/components/CustomConnectionLine.tsx
@@ -0,0 +1,35 @@
+import React from 'react'
+import {
+  ConnectionLineComponentProps,
+  getBezierPath,
+  Position,
+} from '@xyflow/react'
+
+const CustomConnectionLine: React.FC<ConnectionLineComponentProps> = ({
+  fromX,
+  fromY,
+  toX,
+  toY,
+  connectionLineStyle,
+}) => {
+  const [edgePath] = getBezierPath({
+    sourceX: fromX,
+    sourceY: fromY,
+    sourcePosition: 'bottom' as Position,
+    targetX: toX,
+    targetY: toY,
+    targetPosition: 'top' as Position,
+  })
+
+  return (
+    <path
+      fill="none"
+      stroke={connectionLineStyle?.stroke || '#999'}
+      strokeWidth={connectionLineStyle?.strokeWidth || 2}
+      className="animated"
+      d={edgePath}
+    />
+  )
+}
+
+export default CustomConnectionLine