Advocates for a capella (or non-instrumental) music in worship frequently turn to Ephesians 5:19 and Colossians 3:16. Neither of these prohibits instruments in so many words; rather, they describe the actions of worshipful, thankful hearts as they address their Father to offer Him praise. That said, these and every other passage in the New Testament that refer to music in the assembly mentions and emphasizes singing. Instruments are not mentioned at all.
This constitutes a pattern.