You are not a Christian (i.e. a follower of Jesus)? All Christians agree that God said "Let there be light!" That is a willful, deliberate act (change) on God's part, an act which is incompatible with timeless existence.
How does God communicate, indeed intervene with the temporal and changing world in his state of timeless, unchanging eternity?
I don't know a serious (in my opinion) Christian theologian that believes God has vocal chords.