Here's why:

* Simple machines are basic mechanical devices that change the direction or magnitude of a force. Examples include levers, pulleys, wheels and axles, inclined planes, wedges, and screws.

* CD players are complex systems that involve multiple components working together, including a laser, a motor, electronics, and software.

* CD players utilize electricity to function, unlike simple machines which are purely mechanical.

While a CD player may use some simple machine principles (like the wheel and axle in the disc drive), its overall functionality and complexity make it a complex machine rather than a simple machine.