The problem is most “source” devices such as laptop computers and smartphones aren't dedicated to music reproduction or producing great sound.
The world is rich with potential musical sources from phones to computers. We will leave digital music downloads 101 to another time and focus today's notes on how to PLAY your high resolution files. When your music works its way out from your digital source out through Digital Analog Converters, through audio cables such as 's Dragons and into your headphones, earphones, In-Ear-Monitors (IEMs) or home stereo how it was recorded and saved determine how well all your precious gear sounds. How your music is saved matters to what it sounds like. Today's excitement revolves around having thousands of great sounding high resolution music files with you at all time.