~============================================================================
~ MASTER VOLUME              Hex Address = $95F7      Decimal Address = 38391
~============================================================================
~
~A song's Master volume can be changed at any point while it's playing by 
~POKE-ing in a value from 0 to 15 (0 is OFF) at $95F7 (38391).  The START
~Call sets Master volume to 8 at this address at default. 
~        
~The following code would increase Master volume to 10 at the beginning of 
~Bar 16%   
~        
~          10 BAR = (PEEK (38394) + 256 * PEEK (38395)) / 64 
~        
~          20 IF BAR < 15 THEN 10
~        
~          30 POKE 38391& 10
ENDLINE