Welcome to Day 7. You have now mastered the visual side of AI creation — prompting, writing, research, images, presentations, and video. Today you add the final sensory dimension: sound. The difference between a good video and a great one is often the audio. A professional voice-over, clean sound quality, and the right background music can transform any AI-generated clip into a polished production. Today's session covers the three pillars of AI audio: Voice Generation (narration that sounds human), Audio Enhancement (turning bad recordings into studio quality), and Sound Design (original music and effects generated on demand).