Just to mention; digital noise is generally speaking orders of magnitude higher in frequency than the audible spectrum, so its not noise that you can hear directly….its noise that interferes with digital processing throughout the system and is ‘heard’ as a lack of quality. In other words, you don’t hear it while its there, but you very clearly hear when its gone by virtue of the music sounding much better.
Let me give you an example:
With noise your music sounds slightly harsh; without it sounds a good deal better. Instead of harshness you now hear the music and the early reflections from the venue, which have low amplitude and subtly different timing. With the noise present, your ears are unable to differentiate (resolve) direct from indirect sounds. The indirect sounds are still there, but unresolved from the direct, adding their energy to the direct sound, making it sound slightly harsh.
With the noise removed, the music is often described as sounding more detailed, with greater soundstage. The music hasn’t actually changed…the bits are still the same. What has changed is its presentation, with subtle differences easier to detect and differentiate
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