The following material is Open Game Content from a 3PP Source
School transmutation; Level bard 0
Casting Time 1 swift action
Components V, S
Target one non-magical musical instrument
Saving Throw Will negates (object); Spell Resistance yes (object)
You instantly tune one normal, non-magical musical instrument of any type to a perfect pitch. The tuning gives you a +1 competence bonus to your next Perform (that instrument) check, which must be made immediately after casting the spell.