People cant always get there head around The creation. God is out side of our box. There is no concept of time to God and areas in space or the universe where may once have been void God has and had the power to create within that space and time. God spoken Everything into exsistence.
In the beginning God created the heavens and the earth. Now the earth was formless and empty, darkness was over the surface of the deep, and the Spirit of God was hovering over the waters.
And God said, “Let there be light,” and there was light. God saw that the light was good, and he separated the light from the darkness. God called the light “day,” and the darkness he called “night.” And there was evening, and there was morning—the first day.
Its a bit like an open space area of land before a builder builds a house on it. He assess is and measures it and looks around it. (just like Gods spirit hovered over the waters before speaking things into creation)
Until the house is built that land also was once void....
Sound may have not exsisted to Us but it always exsisted to God.