If a CD is listened in a room with a loudspeaker the reverberation of the room seems to cover some of the grain nastiness.
Listening with a very analytical headphone setup as the one transistor per channel Pleiades 2N3053 to Sennheiser HD580 the sand grain can be heard. Also at small modulation levels if the amplifier is increased noise is very easy to hear. This would be 0 1 random noise. Sand.
At digital systems distortion tends to infinity as the signal tends to 0.
On analog class A (electrons flowing all the time) distortion tends to 0 as signal tends to zero just like nature.
And analog hiss (thermal agitation of electrons) sounds so nice.
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