Available at stores like Thomann for approximately $48/49€ .

Train Your Ears EQ Edition is a software tool designed to help music producers, engineers, and audiophiles improve their equalization (EQ) skills. It's an interactive training program that aims to teach users how to hear and adjust EQ frequencies more accurately.

When it comes to music production, EQ is one of the most essential tools in your arsenal. It allows you to adjust the balance of frequencies in your mix, making it sound more balanced and polished. However, to use EQ effectively, you need to develop a good ear for it.