Simplify the following text for a Grade 10 native English-speaking person.
Original: DSP is usually used with real-world analog signals found in our lives , the first step is usually to convert the signal from an analog to a digital form , by using an analog to digital converter . Often , the required output signal is another real-world analog signal , which requires a digital to analog converter .
Simplified: A digital-to-analog converter is used to convert the digital signal back to analog .