I have been think about this and I thought should a shinigami who uses sound and music have the ability to mimic reistu and the answer is no. so I propose a change

Name: Stacato
Duration: 7 posts/ cool down 7 posts
Effect: by changing his reitsu in short powerful bursts from his skin, Koshi can protect himself from attacks. It works similarly to the hollow ability Herro but uses sound/vibrations as opposed to reitsu. It can stop weaker foes attacks out right and only slow down equal/stronger foes attacks causing less damage

Rp example
The city was in ruins after the adjudas rampage,i stand at the ready facing the hollow head on my zanpacto in hand. It sonidos towards me as I flash step in response I swing but it changes direction in an instant. I feel it strike my back with its clawed hand but only a line crimson line appears. I turn and smile "sound is my protector that strike could have been fatal. You look shocked allow me explain. I call it stacato, similar to what you skum call herro. Sound is my protector as I have said but its also my weapon. Silence Kurayami no naka de kashu!" The last thing the hollow saw was a flash of a red blade and its head rolled to the ground.

Approved.

Thank you sir

No problem.