The simple answer is yes. The New Testament does not speak to the use of instruments as it has already been established and was understood that their use is tied into the ceremonial aspects of their prescribed form of worship that was abolished by the perfect sacrifice of Christ. It would also be understood by every Jew at the time, as it was so commanded, that the use of instruments was only permissible in temple worship, the local synagogues would all practice what we would call today 'a Capella psalmody'. In being faithful to the RPW we must conclude from the lack of a positive command for using instruments that their use was abolished with the system of temple worship that was fulfilled in the once for all sacrifice of Christ. On top of that we add the positive command of the New Testament that our worship is to no longer to be centered on the temple, with its types and shadows of what was to come, but it is now centered on the perfect fulfillment of the perpetual sacrifice of Christ, and by us worship is to now be done in spirit and truth (John 4:24), by the fruit of our lips (Hebrew 13:15), with melody being made in our hearts (Ephesians 5:19). This therefore precludes the use of instruments in the church.