I believe that the best, most Biblical way to praise God in church assemblies is strictly with a cappella singing—no instrumental music. In this part of a class that I taught, I talk to other believers who share that conviction, noting that: 1) In the broader scope of Christian history, a cappella church singing isn't unusual at all, 2) sometimes those who hold this conviction have articulated it poorly and should do better, and 3) there is more to righteous praise than just getting the method of music correct.

I hope this proves helpful to you!