diff --git a/src/app/basicWavReader.cpp b/src/app/basicWavReader.cpp
index 5e5e32f..d9bbc9f 100644
--- a/src/app/basicWavReader.cpp
+++ b/src/app/basicWavReader.cpp
@@ -444,6 +444,8 @@ unsigned BasicWavReader::read (int32_t* const frameBuf, const uint16_t frameCoun
   if ((frameBuf == nullptr) || (m_fileHandle == -1) || (framesTotal == 0) || (m_byteBuffer == nullptr) ||
       (m_bytesRemaining <= 0)) // end of chunk reached
   {
+    if (frameBuf != nullptr) memset (frameBuf, 0, framesTotal * m_waveChannels * sizeof (int32_t));
+
     return 0; // invalid args or class not initialized
   }
   framesRead  = m_readDataFunc (m_fileHandle, frameBuf, framesTotal, m_waveChannels, m_byteBuffer);
diff --git a/src/app/exhaleApp_vs2012.vcxproj.user b/src/app/exhaleApp_vs2012.vcxproj.user
index fc19bc1..686406f 100644
--- a/src/app/exhaleApp_vs2012.vcxproj.user
+++ b/src/app/exhaleApp_vs2012.vcxproj.user
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
-    <LocalDebuggerCommandArguments># C:\ha2010.wav debug.m4a &gt; ..\..\debug.txt</LocalDebuggerCommandArguments>
+    <LocalDebuggerCommandArguments># C:\ha2010.wav ..\..\debug.m4a &gt; ..\..\debug.txt</LocalDebuggerCommandArguments>
     <DebuggerFlavor>WindowsLocalDebugger</DebuggerFlavor>
   </PropertyGroup>
 </Project>
\ No newline at end of file
diff --git a/src/lib/bitStreamWriter.cpp b/src/lib/bitStreamWriter.cpp
index 13fa487..8ffa51f 100644
--- a/src/lib/bitStreamWriter.cpp
+++ b/src/lib/bitStreamWriter.cpp
@@ -128,12 +128,12 @@ static unsigned getLowRatePreRollAU (uint8_t* const byteBuffer, const CoreCoderD
     if (useSbr) // UsacSbrData()
     {
       au.write (1, 7);// SbrInfo(), sbrUseDfltHeader
-      if (et) au.write (1, 1); // sbr_data(), couple
-      au.write (0, 7);
-      au.write (0, et ? 31 : 17);
-#if ENABLE_INTERTES
+      if (et) au.write (0, 1);  // fix _coupling = 0
+      au.write (0, 8 << et);
+      au.write (0, 16 << et);
+# if ENABLE_INTERTES
       au.write (0, et + 1);
-#endif
+# endif
     }
 
     if (au.heldBitCount > 0) au.stream.push_back (au.heldBitChunk);
@@ -814,8 +814,8 @@ unsigned BitStreamWriter::createAudioConfig (const char samplingFrequencyIndex,
 #endif
                                              const uint8_t sbrRatioShiftValue,   unsigned char* const audioConfig)
 {
-  const uint8_t fli = (sbrRatioShiftValue == 0 ? 1 /*no SBR*/ : __min (2, sbrRatioShiftValue) + 2);
-  const int8_t usfi = __max (0, samplingFrequencyIndex - 3 * sbrRatioShiftValue); // TODO: non-standard sampling rates
+  const uint8_t fli = (sbrRatioShiftValue == 0 ? 1 /*no SBR*/ : __min (2, sbrRatioShiftValue & 3) + 2);
+  const int8_t usfi = __max (0, samplingFrequencyIndex - 3 * (sbrRatioShiftValue & 3)); // TODO: nonstandard rates
   unsigned bitCount = 37, auLen;
 #ifndef NO_PREROLL_DATA
   unsigned ucOffset = (samplingFrequencyIndex < AAC_NUM_SAMPLE_RATES ? 2 : 5);
@@ -881,7 +881,7 @@ unsigned BitStreamWriter::createAudioConfig (const char samplingFrequencyIndex,
         m_auBitStream.write (0, 3);  // fix harmonicSBR, bs_interTes, bs_pvc = 0
 #endif
         bitCount += 13; // incl. SbrDfltHeader following hereafter
-        m_auBitStream.write (15, 4); // 11025 @ 44.1, 11625 @ 48, 15000 @ 64 kHz
+        m_auBitStream.write (15 - (sbrRatioShiftValue / 4), 4); // bs_start_freq
         m_auBitStream.write (sf, 4); // 16193 @ 44.1, 18375 @ 48, 22500 @ 64 kHz
         m_auBitStream.write ( 0, 2); // fix dflt_header_extra* = 0