Consider an an analogue tape machine then. That's more like Class D than an actual analogue. To see the flaw in your digital viewpoint requires following some maths, but the results are really quite neat.The record groove is a physical manifestation of the waveform of the recorded sound.
So for example if you looked at that 600 Hz sound on an oscilloscope, you'd see a sinusoidal waveform that's identical to the record groove. Now check a cd or digital medium and you will find - oh yes zeros and ones. Something had to convert that analogue signal to a digital one and then convert it back. Also the musician and record producer Dave Grusin believes the only way to get the best from digitial is to record as live ass possible on two tracks for stereo. His reasoning is each track is a sample of what is recorded, the more tracks the more samples and when mixed down to two tracks it is a sample of a sample.
All I do know is when you listen to a Grusin record you wish that all records were as well produced and soundwise was their equal
No idea about Dave Grusin, but I like records. I'm just pragmatic about the inaudibility of inserting an ADC/DAC.