diff --git a/include/FileLoop.h b/include/FileLoop.h
index c9950e2..6cfe0c7 100644
--- a/include/FileLoop.h
+++ b/include/FileLoop.h
@@ -95,7 +95,7 @@ class FileLoop : protected FileWvIn
     corresponds to file cycles per second.  The frequency can be
     negative, in which case the loop is read in reverse order.
   */
-  void setFrequency( StkFloat frequency ) { this->setRate( file_.fileSize() * frequency / Stk::sampleRate() ); };
+  void setFrequency( StkFloat frequency ) { this->setRate( fileSize_ * frequency / Stk::sampleRate() ); };
 
   //! Increment the read pointer by \e time samples, modulo file size.
   void addTime( StkFloat time );
diff --git a/include/FileWvIn.h b/include/FileWvIn.h
index edb112c..378663f 100644
--- a/include/FileWvIn.h
+++ b/include/FileWvIn.h
@@ -89,7 +89,7 @@ public:
   virtual void normalize( StkFloat peak );
 
   //! Return the file size in sample frames.
-  virtual unsigned long getSize( void ) const { return file_.fileSize(); };
+  virtual unsigned long getSize( void ) const { return fileSize_; };
 
   //! Return the input file sample rate in Hz (not the data read rate).
   /*!
@@ -171,6 +171,7 @@ protected:
   bool chunking_;
   StkFloat time_;
   StkFloat rate_;
+  unsigned long fileSize_;
   unsigned long chunkThreshold_;
   unsigned long chunkSize_;
   long chunkPointer_;
diff --git a/src/FileLoop.cpp b/src/FileLoop.cpp
index cc34b6b..ba84985 100644
--- a/src/FileLoop.cpp
+++ b/src/FileLoop.cpp
@@ -77,6 +77,10 @@ void FileLoop :: openFile( std::string fileName, bool raw, bool doNormalize )
   // Resize our lastOutputs container.
   lastFrame_.resize( 1, file_.channels() );
 
+  // Close the file unless chunking
+  fileSize_ = file_.fileSize();
+  if ( !chunking_ ) file_.close();
+
   // Set default rate based on file sampling rate.
   this->setRate( data_.dataRate() / Stk::sampleRate() );
 
@@ -98,29 +102,27 @@ void FileLoop :: addTime( StkFloat time )
   // Add an absolute time in samples.
   time_ += time;
 
-  StkFloat fileSize = file_.fileSize();
   while ( time_ < 0.0 )
-    time_ += fileSize;
-  while ( time_ >= fileSize )
-    time_ -= fileSize;
+    time_ += fileSize_;
+  while ( time_ >= fileSize_ )
+    time_ -= fileSize_;
 }
 
 void FileLoop :: addPhase( StkFloat angle )
 {
   // Add a time in cycles (one cycle = fileSize).
-  StkFloat fileSize = file_.fileSize();
-  time_ += fileSize * angle;
+  time_ += fileSize_ * angle;
 
   while ( time_ < 0.0 )
-    time_ += fileSize;
-  while ( time_ >= fileSize )
-    time_ -= fileSize;
+    time_ += fileSize_;
+  while ( time_ >= fileSize_ )
+    time_ -= fileSize_;
 }
 
 void FileLoop :: addPhaseOffset( StkFloat angle )
 {
   // Add a phase offset in cycles, where 1.0 = fileSize.
-  phaseOffset_ = file_.fileSize() * angle;
+  phaseOffset_ = fileSize_ * angle;
 }
 
 StkFloat FileLoop :: tick( unsigned int channel )
@@ -134,20 +136,18 @@ StkFloat FileLoop :: tick( unsigned int channel )
 
   // Check limits of time address ... if necessary, recalculate modulo
   // fileSize.
-  StkFloat fileSize = file_.fileSize();
-
   while ( time_ < 0.0 )
-    time_ += fileSize;
-  while ( time_ >= fileSize )
-    time_ -= fileSize;
+    time_ += fileSize_;
+  while ( time_ >= fileSize_ )
+    time_ -= fileSize_;
 
   StkFloat tyme = time_;
   if ( phaseOffset_ ) {
     tyme += phaseOffset_;
     while ( tyme < 0.0 )
-      tyme += fileSize;
-    while ( tyme >= fileSize )
-      tyme -= fileSize;
+      tyme += fileSize_;
+    while ( tyme >= fileSize_ )
+      tyme -= fileSize_;
   }
 
   if ( chunking_ ) {
@@ -162,8 +162,8 @@ StkFloat FileLoop :: tick( unsigned int channel )
       }
       while ( time_ > (StkFloat) ( chunkPointer_ + chunkSize_ - 1 ) ) { // positive rate
         chunkPointer_ += chunkSize_ - 1; // overlap chunks by one frame
-        if ( chunkPointer_ + chunkSize_ > file_.fileSize() ) { // at end of file
-          chunkPointer_ = file_.fileSize() - chunkSize_ + 1; // leave extra frame at end of buffer
+        if ( chunkPointer_ + chunkSize_ > fileSize_ ) { // at end of file
+          chunkPointer_ = fileSize_ - chunkSize_ + 1; // leave extra frame at end of buffer
           // Now fill extra frame with first frame data.
           for ( unsigned int j=0; j<firstFrame_.channels(); j++ )
             data_( data_.frames() - 1, j ) = firstFrame_[j];
diff --git a/src/FileWvIn.cpp b/src/FileWvIn.cpp
index 280d33f..c8e02e2 100644
--- a/src/FileWvIn.cpp
+++ b/src/FileWvIn.cpp
@@ -98,6 +98,10 @@ void FileWvIn :: openFile( std::string fileName, bool raw, bool doNormalize )
   // Resize our lastFrame container.
   lastFrame_.resize( 1, file_.channels() );
 
+  // Close the file unless chunking
+  fileSize_ = file_.fileSize();
+  if ( !chunking_ ) file_.close();
+
   // Set default rate based on file sampling rate.
   this->setRate( data_.dataRate() / Stk::sampleRate() );
 
@@ -146,7 +150,7 @@ void FileWvIn :: setRate( StkFloat rate )
 
   // If negative rate and at beginning of sound, move pointer to end
   // of sound.
-  if ( (rate_ < 0) && (time_ == 0.0) ) time_ = file_.fileSize() - 1.0;
+  if ( (rate_ < 0) && (time_ == 0.0) ) time_ = fileSize_ - 1.0;
 
   if ( fmod( rate_, 1.0 ) != 0.0 ) interpolate_ = true;
   else interpolate_ = false;
@@ -158,8 +162,8 @@ void FileWvIn :: addTime( StkFloat time )
   time_ += time;
 
   if ( time_ < 0.0 ) time_ = 0.0;
-  if ( time_ > file_.fileSize() - 1.0 ) {
-    time_ = file_.fileSize() - 1.0;
+  if ( time_ > fileSize_ - 1.0 ) {
+    time_ = fileSize_ - 1.0;
     for ( unsigned int i=0; i<lastFrame_.size(); i++ ) lastFrame_[i] = 0.0;
     finished_ = true;
   }
@@ -176,7 +180,7 @@ StkFloat FileWvIn :: tick( unsigned int channel )
 
   if ( finished_ ) return 0.0;
 
-  if ( time_ < 0.0 || time_ > (StkFloat) ( file_.fileSize() - 1.0 ) ) {
+  if ( time_ < 0.0 || time_ > (StkFloat) ( fileSize_ - 1.0 ) ) {
     for ( unsigned int i=0; i<lastFrame_.size(); i++ ) lastFrame_[i] = 0.0;
     finished_ = true;
     return 0.0;
@@ -195,8 +199,8 @@ StkFloat FileWvIn :: tick( unsigned int channel )
       }
       while ( time_ > (StkFloat) ( chunkPointer_ + chunkSize_ - 1 ) ) { // positive rate
         chunkPointer_ += chunkSize_ - 1; // overlap chunks by one frame
-        if ( chunkPointer_ + chunkSize_ > file_.fileSize() ) // at end of file
-          chunkPointer_ = file_.fileSize() - chunkSize_;
+        if ( chunkPointer_ + chunkSize_ > fileSize_ ) // at end of file
+          chunkPointer_ = fileSize_ - chunkSize_;
       }
 
       // Load more data.