diff --git a/lib/rbcodec/codecs/libatrac/atrac3.c b/lib/rbcodec/codecs/libatrac/atrac3.c
index 877e2fbfc6..ea3b02fc86 100644
--- a/lib/rbcodec/codecs/libatrac/atrac3.c
+++ b/lib/rbcodec/codecs/libatrac/atrac3.c
@@ -252,11 +252,16 @@ atrac3_imdct_windowing(int32_t *buffer,
                        const int32_t *win)
 {
     int32_t i;
-    /* win[0..127] = win[511..384], win[128..383] = 1 */
+    /* win[0..127] = win[511..384] */
     for(i = 0; i<128; i++) {
         buffer[    i] = fixmul31(win[i], buffer[    i]);
         buffer[511-i] = fixmul31(win[i], buffer[511-i]);
     }
+    /* win[128..255] = win[383..256] = 1 + window_lookup_mid[] */
+    for(i = 0; i<128; i++) {
+        buffer[128+i] += fixmul31(window_lookup_mid[i], buffer[128+i]);
+        buffer[383-i] += fixmul31(window_lookup_mid[i], buffer[383-i]);
+    }
 }
 
 
diff --git a/lib/rbcodec/codecs/libatrac/atrac3data_fixed.h b/lib/rbcodec/codecs/libatrac/atrac3data_fixed.h
index 3cc4e0837c..54ec832880 100644
--- a/lib/rbcodec/codecs/libatrac/atrac3data_fixed.h
+++ b/lib/rbcodec/codecs/libatrac/atrac3data_fixed.h
@@ -76,6 +76,35 @@ static const int32_t window_lookup[128] ICONST_ATTR MEM_ALIGN_ATTR = {
     -0x82660c01, -0x80ca4a01,  
 };
 
+/* The window above is the first 128 points of the 512 point mdct window.
+ * Points 128..255 are these values plus one, scaled by 2^31; they rise to
+ * 1.207 and fall back to 1. The second half of the window mirrors the
+ * first. */
+static const int32_t window_lookup_mid[128] ICONST_ATTR MEM_ALIGN_ATTR = {
+    0x00c7d1c8, 0x024fd962, 0x03cd6738, 0x05401bc8, 0x06a79e95, 0x08039e75,
+    0x0953d1d1, 0x0a97f6df, 0x0bcfd3c6, 0x0cfb36c3, 0x0e19f636, 0x0f2bf0a8,
+    0x10310cc9, 0x11293955, 0x12146d01, 0x12f2a64e, 0x13c3eb59, 0x148849a0,
+    0x153fd5c0, 0x15eaab2c, 0x1688ebd9, 0x171abfeb, 0x17a05559, 0x1819df8c,
+    0x188796ff, 0x18e9b8db, 0x1940868e, 0x198c456d, 0x19cd3e43, 0x1a03bcf6,
+    0x1a301021, 0x1a5288af, 0x1a6b7984, 0x1a7b371a, 0x1a821730, 0x1a807072,
+    0x1a769a2c, 0x1a64ebfc, 0x1a4bbd8d, 0x1a2b6653, 0x1a043d52, 0x19d698de,
+    0x19a2ce6d, 0x19693261, 0x192a17e5, 0x18e5d0be, 0x189cad2d, 0x184efbcf,
+    0x17fd0985, 0x17a72158, 0x174d8c6b, 0x16f091e8, 0x169076f2, 0x162d7ea1,
+    0x15c7e9f4, 0x155ff7cf, 0x14f5e4fc, 0x1489ec23, 0x141c45d4, 0x13ad2886,
+    0x133cc89d, 0x12cb5870, 0x12590851, 0x11e60697, 0x11727fa4, 0x10fe9df7,
+    0x108a8a2e, 0x10166b1a, 0x0fa265c6, 0x0f2e9d86, 0x0ebb3404, 0x0e48494e,
+    0x0dd5fbe2, 0x0d6468bc, 0x0cf3ab63, 0x0c83ddf9, 0x0c151945, 0x0ba774c2,
+    0x0b3b06af, 0x0acfe414, 0x0a6620d7, 0x09fdcfc5, 0x0997029e, 0x0931ca20,
+    0x08ce3615, 0x086c555d, 0x080c35f8, 0x07ade513, 0x07516f11, 0x06f6df92,
+    0x069e4182, 0x06479f20, 0x05f30203, 0x05a0732a, 0x054ffafe, 0x0501a15d,
+    0x04b56d9f, 0x046b66a1, 0x042392c9, 0x03ddf80e, 0x039a9bfc, 0x035983bd,
+    0x031ab41f, 0x02de3196, 0x02a40042, 0x026c23f9, 0x0236a043, 0x02037867,
+    0x01d2af6a, 0x01a44813, 0x017844f1, 0x014ea85c, 0x0127747d, 0x0102ab49,
+    0x00e04e8c, 0x00c05fe5, 0x00a2e0cf, 0x0087d29c, 0x006f367d, 0x00590d81,
+    0x00455897, 0x00341890, 0x00254e20, 0x0018f9df, 0x000f1c4a, 0x0007b5c4,
+    0x0002c697, 0x00004ef5,
+};
+
 /* Gain tables scaled by 2^16 */
 static const int32_t gain_tab2[31] ICONST_ATTR = {
     0x0003ab03, 0x00035d14, 0x0003159d, 0x0002d414, 0x000297fb, 0x000260e0,