The company offered us a digital language classroom for our supposedly analog classroom, which has been working to our satisfaction for many years. What is the difference between an analog and a digital classroom?

I can say with certainty that this is a business trick to get you to buy a new language classroom from the company. Analog language classrooms were manufactured by the state-owned company Tesla until 1989. After that time, no company offered an analog version. Digital language classrooms are always controlled by a computer built into the control desk, or the cheapest ones are controlled directly from a PC.