There are NO scriptures that tell us to not use musical instruments in a worship service. There were rooms in the temple in Jerusalem that housed and protected instruments of that day. I have been a music/worship director for years and have experienced all kinds of man-made rules about just what constitutes a good worship service and what instruments are to be used or not. In one situation, a prominent business man had my gospel group to sing and perform for his funeral, as part of his will. When we got to the church early to set up, the priest was horrified but, at the same time, wanted to honor the wishes of the deceased and his family. My gospel group, and all instruments, were hidden behind a huge black curtain as to fool the people into thinking it was pre-recorded music being piped in. Imagine that!
I think the 'modern' problem with having electrical instruments and drums in a santuary carries the stigma of a rock concert where the loud, driving force of the music overpowers the vocals. This is a great fear of a lot of older members who are very complacent with the sound of a mid to lower range piano as a backdrop for the sluggish hymns that are so prominently a part of the traditional service.
I faced this situation way back in the 1960's and 1970's when I was a Youth Team President of a travelling Choir who provided live music as part of our programs. It was not just the music that most members hated, it was the style clothing, the length of the hair on the boys and the absence of suits that offenced many. I still face similar situations, in those frozen/chosen churches. If you want a more lively form of worship where modern instruments are used, you will find them more acceptable in a Happy/Clappy congregation, 'Nuff Said!.