Is there a really good DVD that teaches more than just the basics of using a pot call?  I know the general idea, but I have always been tone deaf and "musically" dumb.  
I will never get to the point of being a champion caller.  I just do not have the musical gene.  I just want to get better than I am at currently.  
Secondly, if anyone has any DVDs that they have outgrown I wouldn't mind putting them to good use once again. 
Thanks,
Thomas