The tune 'Mrs MacDonald of Dunach' played on the practice chanter then as mouth-music (canntaireachd). Stanley Robertson explains the relationship between the two. He demonstrates the difference between a fiddler's diddling and a piper's canntaireachd. He discusses different views on the syllables that should be sung for diddling, and contrasts the style used at a competition in Kinross with his own style. He demonstrates 'The Dashing White Sergeant' as if on the accordion.