Thank you for the replies so far; they are helpful. The main thing I'm trying to understand is the Biblical stance for why it's okay to use instruments. What is it in the Bible that has convinced you that we have the freedom to use them and pick which ones, etc. Thanks!
Let me reiterate, we can praise God with or without instruments.
With that said, let me try to answer your question:
1. "Is anyone among you suffering? Let him pray. Is anyone cheerful? Let him sing psalms." (James 5:13) "Sing psalms" in Greek is
ψάλλω. Strongs defines as such: "properly, pluck a musical instrument (like a harp); used of "
singing along with instruments"; "to
make music," or simply
sing." From an etymological standpoint, the word in its very definition has to do with playing an instrument.
2. When musical instruments are used as an aid to singing, they assist in the congregation singing the words of praise together. This aid to singing in unison also is an aid to singing words with
clarity. When words have clarity, they are more easily
understood (think of children who cannot yet read but can speak, and therefore cannot follow the text). Paul says "I will sing [
ψάλλω] with the spirit, and I will also sing [
ψάλλω]
with the understanding." (1 Cor. 14:15) Therefore if instruments can aid in understanding, why not use them?
3. Praise is something that we do physically, but it comes from within,
then from without. Paul says again we are to be "speaking to one another in psalms and hymns and spiritual songs, singing and making melody [
ψάλλω] in your heart to the Lord." Our singing, if not done with understanding (yes, our
uninspired understanding), wells up in us-- from the whole person overjoyed by the work of God in our lives-- and the
manifestation of this joy is in physical praise. Our praise doesn't always come out in the same tunes, or the same words, or with the same instruments, but it always comes from the same place-- the heart, sung with understanding. Because of this, I want to be careful not to focus too much on the
external manifestation of our praise, but from the place from which it comes.