The Lotro-Wiki says: <quote>
The tooltip of this skill is confusing. This skill deals AoE damage and applies the following effects on all nearby enemies:
(long list of damage versions, but no stun)
I would say, it has been changed.
Minstrels have a similar issue with Piercing Cry. It got changed to interruption only, with one exception: when you go into harmonious stance and crit or devastate, you will get a stun effect. Not funny when an enraged troll is heading towards you and your cloth armour.
Greetings, Polymachos