We could use this argument for many things. Not just instruments. We are not bound by the OT. Many things happened in the OT that isn't permitted in the church today. I am just wondering are we picking and choosing what we WANT to practice or are we going by scripture?We could do that with a lot of verses, not just this one. Just because the verse doens't mention musical instruments, doesn't mean it's forbidding them. Since musical instruments were used in the OT, it would make sense to think that it wasn't needed to state that people could use musical instruments in the NT also. If God had changed his mind, I think He would've made sure that there was a verse in the NT prohibiting the practice. But there isn't.
Also, this link provides a good answer : Are we supposed to use musical instruments in church?
Theres quite a few people in this thread that have made comments that amaze me. They're quick to defend "no it isn't outright mentioned in scripture but its ok" while in other threads speaking against the eating of certain foods, obvservation of holidays, and certain other practices Christians may be involved with.