Answerのコピペ (抜粋):
The answer lies in the difference between analog and digital recordings. A vinyl record is an
analog recording, and CDs and DVDs are digital recordings.
(中略)
This means that, by definition, a digital recording is not capturing the complete sound wave. It
is approximating it with a series of steps. Some sounds that have very quick transitions, such as a
drum beat or a trumpet's tone, will be distorted because they change too quickly for the sample rate.

(中略)
A vinyl record has a groove carved into it that mirrors the original sound's waveform. This means
that no information is lost. The output of a record player is analog. It can be fed directly to your amplifier with no conversion.

This means that the waveforms from a vinyl recording can be much more accurate, and that can be
heard in the richness of the sound.
(以下略)