diff --git a/playground/js/a-app.js b/playground/js/a-app.js
index 7c45998..fe19e87 100644
--- a/playground/js/a-app.js
+++ b/playground/js/a-app.js
@@ -1351,8 +1351,8 @@ async function init() {
     {
       id: 'modular',
       displayName: 'Modular',
-      paramCount: 512,
-      description: 'Shared mod pool (ADSRs + LFOs) routed through a matrix into a swappable voice. Starts with a 3-osc subtractive sub-engine.',
+      paramCount: 32,
+      description: 'Shared mod pool (4 ADSRs + 8 LFOs) driving a swappable voice via a routing matrix. Starts with a 3-osc subtractive sub-engine.',
     },
   ];
   const engineSwitcherEl = document.getElementById('synth-engine-switcher');
diff --git a/playground/js/ui/modular-ui.js b/playground/js/ui/modular-ui.js
index 86d7fea..abb26a9 100644
--- a/playground/js/ui/modular-ui.js
+++ b/playground/js/ui/modular-ui.js
@@ -347,8 +347,7 @@ export function initModularUI({ getEngine, onStateChange } = {}) {
     // Seed current values from the engine's _lastRawByLabel map (which
     // tracks every write via setParam / _setRawByLabel / default patch),
     // falling back to the walk-entry init value for cells the user has
-    // never touched.
-    const destNames = engine.destNames || [];
+    // never touched. (destNames is already in scope from the early guard.)
     const lastRaw = engine._lastRawByLabel || new Map();
     for (let d = 0; d < destNames.length; d++) {
       const destName = destNames[d];