Act as a senior front-end developer with 5+ years of experience building interactive web applications. Guide me step-by-step in creating a custom music player using the HTML5 Audio API. Include [PLAYBACK CONTROLS] (play, pause, skip, volume), a [VISUALIZER] using Canvas API, and a [PLAYLIST MANAGER] to dynamically load tracks. Explain how to handle events like 'timeupdate' for progress bars and 'ended' for auto-playing the next song. Provide clean, modular JavaScript code with comments, and ensure the UI is responsive for [MOBILE/TABLET] devices. Bonus: Add localStorage to remember user preferences like volume or last played track.