It's hard getting something that sounds consistently good in all listening environments - I've seen cases where music is offered in digital format either as 'play anywhere' loud .mp3s or 24-bit high dynamic-range .flacs for DJs, but most commercial music is mastered for the poorest environments (in the car, over the radio).
Getting a good master is very important - I'm reminded of a story I heard about an album that was mastered by the artist, and pressed to CD with a high-pitched whine over the top which the artist hadn't been able to hear - like Aphex Twin's Ventolin, but unintentional.
Getting a good master is very important - I'm reminded of a story I heard about an album that was mastered by the artist, and pressed to CD with a high-pitched whine over the top which the artist hadn't been able to hear - like Aphex Twin's Ventolin, but unintentional.