PERFECT Pitch is 'The banjo in the skip at fifty paces ON TOP of the Bodhran

ABSOLUTE Pitch is the banjo plus PLAYER as above

RELATIVE Pitch is Banjo plus player plus his Brother as above .

ADDENDUM to Easy Rider's - A Gentleman is someone who takes a Banjo to a session and DOESNT Play it -- A Bastard is someone who takes a banjo to a session and lends it to someone else .