text: Q:
  
  Why is this C played as an A flat?
  
  I am puzzled by the left hand of this piece (Kiss the Rain by Yiruma):
  
  The first note on the lower staff looks like a C to me. However, all video tutorials play it as an A flat (for example here and here).
  How can this be? 
  
  A:
  
  The left hand is in treble clef.
  
  