diff --git a/examples/client_browser.html b/examples/client_browser.html
index 49f41c6..ae66a11 100644
--- a/examples/client_browser.html
+++ b/examples/client_browser.html
@@ -76,17 +76,17 @@
 
     const nextSeq = () => ++seq;
 
-    const ensureAudioContext = () => {
+    const ensureAudioContext = async () => {
       if (!audioCtx) {
         audioCtx = new (window.AudioContext || window.webkitAudioContext)({ sampleRate: 24000 });
       }
       if (audioCtx.state === 'suspended') {
-        audioCtx.resume();
+        await audioCtx.resume();
       }
     };
 
-    const playPcm16 = (base64Data) => {
-      ensureAudioContext();
+    const playPcm16 = async (base64Data) => {
+      await ensureAudioContext();
       const raw = atob(base64Data);
       const samples = new Int16Array(raw.length / 2);
       const view = new DataView(samples.buffer);
@@ -120,7 +120,8 @@
       log(`Connecting to ${uri} ...`);
       try {
         ws = new WebSocket(uri);
-        ws.onopen = () => {
+        ws.onopen = async () => {
+          await ensureAudioContext();
           log('Connected');
           $('connect').disabled = true;
           $('speak').disabled = false;
@@ -144,8 +145,14 @@
         ws.onmessage = (event) => {
           const msg = JSON.parse(event.data);
           if (msg.type === 'audio') {
-            playPcm16(msg.data);
-            log(`audio seq=${msg.seq} len=${(msg.data.length * 3 / 4 / 2 / 24000).toFixed(2)}s`);
+            (async () => {
+              try {
+                await playPcm16(msg.data);
+                log(`audio seq=${msg.seq} len=${(msg.data.length * 3 / 4 / 2 / 24000).toFixed(2)}s`);
+              } catch (err) {
+                log(`audio playback error: ${err.message}`);
+              }
+            })();
           } else if (msg.type === 'status') {
             log(`status ${msg.event} seq=${msg.seq}`);
           } else if (msg.type === 'error') {
@@ -172,7 +179,7 @@
         log('Not connected');
         return;
       }
-      ensureAudioContext();
+      await ensureAudioContext();
       nextStartTime = 0;
 
       const text = $('text').value.trim();