Meaning: This sentence is saying that music can create a beautiful and complex pattern of sounds.
Choice of Words: Music is a series of sounds that are pleasing to the ear. Weaves means to make something by interlacing threads or fibers. Tapestry is a piece of cloth that is made by weaving. Sound is something that you hear. When you put them together, "Music weaves a tapestry of sound" means that music can create a beautiful and complex pattern of sounds.