Windows Media Player's visualizations are created using a combination of algorithms and visual effects. They don't actually analyze the audio track for specific content like lyrics or instruments. Instead, they interpret the audio's frequency spectrum and amplitude to create dynamic visuals.

Here's a breakdown of how it works:

1. Audio Analysis: The player continuously analyzes the audio signal, breaking it down into different frequency ranges (like bass, midrange, and treble).

2. Algorithm Application: The chosen visualization uses an algorithm to interpret the frequencies and amplitude. Different visualizations have different algorithms, leading to different visual styles.

3. Visual Effects: The algorithms then translate this audio data into visual effects, such as moving shapes, colors, and patterns. These visuals change and react in real-time based on the music playing.

Think of it like this: The audio signal acts like a blueprint. Each visualization has its own way of interpreting this blueprint and turning it into a visual representation.

Examples of Visual Effects:

* Bars/Sliders: The height of the bars or sliders represents the amplitude of the audio signal in different frequency ranges.

* Waves: These visualizations simulate ocean waves, with the wave's height and movement correlating with the audio's amplitude and frequency.

* Particles: Particles move and change color based on the audio's frequency and amplitude.

* Abstract Patterns: These visualizations create abstract shapes and patterns that change dynamically based on the audio signal.

While visualizations don't depict specific elements of the music like lyrics or instruments, they offer a visually engaging way to experience the energy and rhythm of the audio.