Design a T-shirt graphic that merges the worlds of sports and music in a fun and engaging way. The digital illustration should feature a baseball bat crossed with a saxophone, surrounded by colorful bursts of sound waves and baseballs. Use a bright color palette with shades of yellow, blue, and red to create an energetic vibe. The background should be simple yet dynamic, allowing the main symbols to shine. Incorporate a fun tagline like "Swing and Sing" in a retro font, positioned at the bottom to complement the design.