diff --git a/resources/views/rd/sound-logo/index.blade.php b/resources/views/rd/sound-logo/index.blade.php
index ceca6417..3978bc79 100644
--- a/resources/views/rd/sound-logo/index.blade.php
+++ b/resources/views/rd/sound-logo/index.blade.php
@@ -1808,11 +1808,14 @@ function soundLogo() {
                     }));
                 };
 
-                ws.onmessage = (event) => {
-                    // 바이너리 Blob은 무시 (JSON 메시지만 처리)
-                    if (event.data instanceof Blob) return;
+                ws.onmessage = async (event) => {
+                    let raw = event.data;
+                    // Blob이면 텍스트로 변환
+                    if (raw instanceof Blob) {
+                        raw = await raw.text();
+                    }
                     let msg;
-                    try { msg = JSON.parse(event.data); } catch { return; }
+                    try { msg = JSON.parse(raw); } catch { return; }
 
                     // Setup 완료
                     if (msg.setupComplete) {