"What is a DAC, and why should I care about having a good one?"
androidcentral[.]com/what-dac-and-why-should-i-care-about-having-good-one
A DAC is a Digital-to-Analog Converter. We're going to focus on how things relate to your smartphone, but a lot of other things you probably have — like a DVD player or a computer — also have a DAC inside and they work the same way. A DAC has one task — convert digital audio information into an analog signal that can be sent out to a speaker or amplifier.While that's the correct and simple definition of a DAC, it's important to understand the difference between digital audio data and analog signals to see why having a good DAC matters.