title: AudioKit - Temporary file size is too big
body: <p>I am using AudioKit's AKNodeRecorder for recording audio.</p>
  
  <p>While recording audio it generates CAF file in a temp directory. if we save it with exportAsynchronously it creates a new file with m4a extension in document directory.</p>
  
  <p>The CAF file generates in temp directory is too big in size.
  1 sec of audio takes
  1 sec = 360000 bytes = 0.36 MB
  Disk space</p>
  
  <p>while after exporting m4a file takes
  1 sec = 32000 bytes = 0.032 MB
  Disk space</p>
  
  <p>The m4a space is good for recording an audio. but the CAF file size is too big for long time recording.</p>
  
  <p>I have to record 2.5 hrs of audio at one time, which will generate 3.6 GB of CAF file</p>
  
  <p>Can we use less disk space while recording?</p>