||At 2nd level, a bard can choose one type of Perform skill. He can use his bonus in that skill in place of his bonus in associated skills. When substituting in this way, the bard uses his total Perform skill bonus, including class skill bonus, in place of its associated skill's bonus, whether or not he has ranks in that skill or if it is a class skill. At 6th level, and every 4 levels thereafter, the bard can select an additional type of Perform to substitute.
The types of Perform and their associated skills are: Act (Bluff, Disguise), Comedy (Bluff, Intimidate), Dance (Acrobatics, Fly), Keyboard Instruments (Diplomacy, Intimidate), Oratory (Diplomacy, Sense Motive), Percussion (Handle Animal, Intimidate), Sing (Bluff, Sense Motive), String (Bluff, Diplomacy), and Wind (Diplomacy, Handle Animal).