KH> The high bias setting is for normal tapes. The reason 
 KH> there are CrO2 and Metal
 KH> bias buttons is to eliminate the high end noise and hiss while dubbing 
Wrong.  
 KH> and listening to tapes. It has something to do with 
 KH> the magnetic qualities of
 KH> the CrO2 and Metal medium.
True.  
See my previous answer to that question, and read up on magnetic media spec's 
and theory, plus try aligning a few dozen (or more) tape decks of various 
formats to understand this better.  
Terry
--- Maximus 2.01wb
---------------