As a seasoned and versatile software developer with a focus on backend development, I'm confident that I have the skills and expertise to deliver precisely what you're looking for in a Windows MP3 Audio Player. My proficiency in C Programming, C#, and C++ will prove instrumental in developing an efficient player as per your requirements.
Not only do I have extensive experience in developing custom Windows applications, but I also possess the knowledge necessary to work smoothly with MP3 audio files. This includes APIs dealing with cache memory management, ensuring your audio files are smoothly stored and played back without any hitches. Furthermore, my strong background in UI/UX design guarantees a user-friendly interface tailored to your needs.
A key feature that sets me apart is my familiarity with implementing automatic online updates in software. I understand the need to keep your audio tracks up-to-date at all times, and I can assure you of a seamless updating process from an online source. Let's team up on this project and create a remarkable audio player that allows your users to enjoy an uninterrupted listening experience.