If charging the sword, you can poke at various surfaces to make a 'tink' sound. (Bombable walls and bomb flags cause a 'tank' sound, which works perfectly)
However, here's a problem. Link's sword 'tinks' against water and Ladder Only combos (where he should probably just poke and no sound is made, or not even poke at all), such as lava in 210test.qst (I enabled Z3 movement). What's he poking against, the invisible wall? Just a thing to think about.
Also, along this point: Sword charging motion is SEVERELY crippled if you're charging a sword without Z3 movement. While charging the sword you can only walk along one axis, and you can't move at all if using a Hurricane Spin without Z3 Movement. This should hopefully be fixed; Some people might want to have a walk grid with spin attacks. *shrug*
Finally, if your sword hits an enemy while you're charging, Link goes into the first frame of a 'slashing' animation for the remainder of the charge.