Class D was not coined for "digital;" it was the next letter after ... and is equivalent to the output of a traditional analog amplifier. Some call this a "synthesized analog" output.

Additionally, advancements in digital-input Class-D amplifiers have been made, where a chopped capacitive feedback network was combined with a digital-to-analog converter (DAC). This design ...

The eight-channel amp delivers source and control flexibility, multichannel power, and easy-to-configure audio filter options ...

Send this PWM signal to a MOSFET or something, and you have the simplest class D amp in existence. They’re so simple, you can buy a class D amp chip for $3, but [George] thought that would be ...