This document discusses how to convert binary numbers to decimal numbers. It explains that binary uses only the digits 0 and 1 to represent on/off states, while decimal uses 0-9. The project takes any 4-digit binary number as input and outputs both its decimal equivalent and a .wav file for the corresponding decimal digit. As an example, it shows that the 4-bit binary number 0101 converts to the decimal number 5 using the place value method.