Strip the high bit from hexdump - convert high ascii to low -

I am working with an Apple II disk image which is checking its contents through hexdump.

The file contains strings for various things encoded, for example, in players name hexdump, they appear in "high" or "extended" ASCII.

This string:

  C2D2C9C1 CE A4CD8C5A6C9D3D4   
 "A ?? one ?? a ?? a ?? a ?? an a ?? a ?? a? An a? A? A? A? Reads as ??? ", But with a high bit, the above string will be  
  42 52 49 41 4E 20 54 48 45 20 46 49 53 54   
" Brian The Fist "will be read  
 I'm searching for a way (" script "or otherwise) to strip" high "ASCII bytes of" Hexdump "or to strip an app The front that can interpret and explain the high character as their lower equivalent.  
  
 
 
 I have found that I can open DSK in Sycrpress, and it will automatically "High" ASCII In a readable form.