With the EngineEars A&B player, clients can listen to the mix/master in real-time on their own device and provide feedback using time-stamped comments. This powerful tool enhances the showcase of your work, allowing you to incorporate files from your projects into your EngineEars portfolio. It's essential to ensure that the correct files are present to maximize its benefits. If any issues arise with the references or mixes, simply re-upload them to resolve the problem and fully leverage the capabilities of the A&B player.