Update index.html

index.html

@@ -1191,57 +1191,58 @@ video.webkitPreservesPitch = true; // 古いWebKit用
         }
     }
 
-    function bufferToWave(abuffer) {
-        const numOfChan = abuffer.numberOfChannels,
-            length = abuffer.length * numOfChan * 2 + 44,
-            buffer = new ArrayBuffer(length),
-            view = new DataView(buffer),
-            channels = [],
-            sampleRate = abuffer.sampleRate,
-            offset = 0,
-            pos = 0;
-
-        // write WAV header
-        setUint32(0x46464952); // "RIFF"
-        setUint32(length - 8); // file length - 8
-        setUint32(0x45564157); // "WAVE"
-
-        setUint32(0x20746d66); // "fmt " chunk
-        setUint32(16); // length = 16
-        setUint16(1); // PCM (uncompressed)
-        setUint16(numOfChan);
-        setUint32(sampleRate);
-        setUint32(sampleRate * 2 * numOfChan);
-        setUint16(numOfChan * 2);
-        setUint16(16);
-
-        setUint32(0x61746164); // "data" - chunk
-        setUint32(length - pos - 4);
-
-        // write interleaved data
-        for (let i = 0; i < abuffer.length; i++) {
-            for (let channel = 0; channel < numOfChan; channel++) {
-                let sample = abuffer.getChannelData(channel)[i] * 0x7fff;
-                if (sample < -32768) sample = -32768;
-                if (sample > 32767) sample = 32767;
-                view.setInt16(pos, sample, true);
-                pos += 2;
-            }
-        }
-
-        function setUint16(data) {
-            view.setUint16(pos, data, true);
+function bufferToWave(abuffer) {
+    const numOfChan = abuffer.numberOfChannels,
+        length = abuffer.length * numOfChan * 2 + 44,
+        buffer = new ArrayBuffer(length),
+        view = new DataView(buffer),
+        channels = [],
+        sampleRate = abuffer.sampleRate;
+        
+    // posをletで宣言（constから変更）
+    let pos = 0;
+
+    // write WAV header
+    setUint32(0x46464952); // "RIFF"
+    setUint32(length - 8); // file length - 8
+    setUint32(0x45564157); // "WAVE"
+
+    setUint32(0x20746d66); // "fmt " chunk
+    setUint32(16); // length = 16
+    setUint16(1); // PCM (uncompressed)
+    setUint16(numOfChan);
+    setUint32(sampleRate);
+    setUint32(sampleRate * 2 * numOfChan);
+    setUint16(numOfChan * 2);
+    setUint16(16);
+
+    setUint32(0x61746164); // "data" - chunk
+    setUint32(length - pos - 4);
+
+    // write interleaved data
+    for (let i = 0; i < abuffer.length; i++) {
+        for (let channel = 0; channel < numOfChan; channel++) {
+            let sample = abuffer.getChannelData(channel)[i] * 0x7fff;
+            if (sample < -32768) sample = -32768;
+            if (sample > 32767) sample = 32767;
+            view.setInt16(pos, sample, true);
             pos += 2;
         }
+    }
 
-        function setUint32(data) {
-            view.setUint32(pos, data, true);
-            pos += 4;
-        }
+    function setUint16(data) {
+        view.setUint16(pos, data, true);
+        pos += 2;
+    }
 
-        return new Blob([buffer], { type: 'audio/wav' });
+    function setUint32(data) {
+        view.setUint32(pos, data, true);
+        pos += 4;
     }
 
+    return new Blob([buffer], { type: 'audio/wav' });
+}
+
     function applyVolume() {
         if (!isAudioCombined) return;