The EQS 580 comes with three distinct sound experiences to "enhance" the ride. Silver Waves sounds almost like a space ship, Vivid Flux has a bit more depth to its sound, and Roaring Pulse seems to be an attempt to sound like an AMG gas engine. All include the option to project the sound outside the car - to share the experience with those around you - and are a nice option from which to chose. That said, I bought an EV to be quiet, so I only turn these on for short periods when I want a change of pace.