diff --git a/Audio/voice/ch-1.wav b/Audio/voice/ch-1.wav
index d8988c3..acbb42c 100644
Binary files a/Audio/voice/ch-1.wav and b/Audio/voice/ch-1.wav differ
diff --git a/Audio/voice/ch-3.wav b/Audio/voice/ch-3.wav
index e0e981a..b5ff378 100644
Binary files a/Audio/voice/ch-3.wav and b/Audio/voice/ch-3.wav differ
diff --git a/Audio/voice/ch-4.wav b/Audio/voice/ch-4.wav
index 7c7833b..6ee87a7 100644
Binary files a/Audio/voice/ch-4.wav and b/Audio/voice/ch-4.wav differ
diff --git a/Audio/voice/ch-5.wav b/Audio/voice/ch-5.wav
index 86b4ba3..bb3f08a 100644
Binary files a/Audio/voice/ch-5.wav and b/Audio/voice/ch-5.wav differ
diff --git a/Audio/voice/ch-7.wav b/Audio/voice/ch-7.wav
index b694fde..b2d006b 100644
Binary files a/Audio/voice/ch-7.wav and b/Audio/voice/ch-7.wav differ
diff --git a/Audio/voice/ch-8.wav b/Audio/voice/ch-8.wav
index e1b4d77..618a154 100644
Binary files a/Audio/voice/ch-8.wav and b/Audio/voice/ch-8.wav differ
diff --git a/CloudServer/server.js b/CloudServer/server.js
index bc9936a..50cd8f7 100644
--- a/CloudServer/server.js
+++ b/CloudServer/server.js
@@ -1235,6 +1235,14 @@ function getOrCreateHlsStreamState(streamName) {
     return hlsStreams[streamName];
 }
 
+function findFileCaseInsensitive(dir, filename) {
+    if (!fs.existsSync(dir)) return null;
+    const files = fs.readdirSync(dir);
+    const lowerFilename = filename.toLowerCase();
+    const match = files.find(f => f.toLowerCase() === lowerFilename);
+    return match ? path.join(dir, match) : null;
+}
+
 function resolveSequenceFiles(seq) {
     ensureSilenceWav();
     const files = [];
@@ -1245,14 +1253,19 @@ function resolveSequenceFiles(seq) {
             continue;
         }
 
-        const candidates = [
-            path.join(audioStationDir, `${item}.wav`),
-            path.join(audioLineDir, `${item}.wav`),
-            path.join(audioVoiceDir, `${item}.wav`),
-            ...getBeepAudioDirs().map(dir => path.join(dir, `${item}.wav`))
+        const dirsToSearch = [
+            audioStationDir,
+            audioLineDir,
+            audioVoiceDir,
+            ...getBeepAudioDirs()
         ];
 
-        const found = candidates.find(p => fs.existsSync(p));
+        let found = null;
+        for (const dir of dirsToSearch) {
+            found = findFileCaseInsensitive(dir, `${item}.wav`);
+            if (found) break;
+        }
+
         if (found) {
             files.push(found);
         } else {