MadAmazone's page

Err..I'm not sure why people are still talking about DR.

> Weird sounds is an Su.(Supernatural Ability).

Weird Words (Su): At 6th level, a sound striker can start a performance as a standard action...

>Thus the damage it deals are damage from supernatural abilities. Yes they are B/P/S damage but still, they are damage from a supernatural ability which is called Weird Words.

>Creatures with DR take normal damage from supernatural abilities.

Damage Reduction (Ex or Su) A creature with this special quality ignores damage from most weapons and natural attacks. Wounds heal immediately, or the weapon bounces off harmlessly (in either case, the opponent knows the attack was ineffective). The creature takes normal damage from energy attacks (even nonmagical ones), spells, spell-like abilities, and supernatural abilities. (Universal Monster Rules from B2)

>Therefore DR does not apply to Weird Words.

It seems very clear imo

Damage Reduction (Ex or Su) A creature with this special quality ignores damage from most weapons and natural attacks. Wounds heal immediately, or the weapon bounces off harmlessly (in either case, the opponent knows the attack was ineffective). The creature takes normal damage from energy attacks (even nonmagical ones), spells, spell-like abilities, and supernatural abilities.

Weird Words (Su): At 6th level, a sound striker can start a performance as a standard action, lashing out with 1 potent sound per bard level (maximum 10), each sound affecting one target within 30 feet. These are ranged touch attacks. Each weird word deals 1d8 points of damage plus the bard's Charisma bonus (Fortitude half), and the bard chooses whether it deals bludgeoning, piercing, or slashing damage for each word. This performance replaces suggestion.

EDIT:
http://paizo.com/pathfinderRPG/prd/additionalMonsters/universalMonsterRules .html