When you rip a CD to an MP3 file, you will find the music loses something (liveliness and realism) in the process by comparing the difference. The higher the bit depth, the clearer the sound will be. High Resolution Audio, also named as hi-res audio, is any audio format beyond the 16-bit/44.1kHz (CD standard).
Part 1High Resolution Audio File Definition Part 2High Resolution Audio Player Features Part 3Hi-Res Music Players (Hardware and Software) Part 4Download Hi-res Music Part 1.