How are computers used as additional performers in live concerts?

Computers are used in live concerts to enhance performances through various means, such as generating backing tracks, controlling lighting and visual effects, and managing live sound mixing. They can also process real-time audio effects, allowing musicians to manipulate their sound dynamically during the performance. Additionally, computers can integrate multimedia elements, like video projections, creating a more immersive experience for the audience. Overall, they serve as versatile tools that expand the creative possibilities for artists on stage.