Why is my 1994 Audi 80 making a high-pitched whining noise when accelerating?

I recently noticed a high-pitched whining noise coming from my 1994 Audi 80 when I accelerate. The noise seems to get louder as I press on the gas pedal. What could be causing this issue and how can I fix it?

It sounds like you may have a problem with your car's serpentine belt. This belt operates several components in your engine, including the alternator and power steering pump. If it is worn or damaged, it can produce a high-pitched whining noise when accelerating. Consider getting it checked and replaced if necessary.