Also, apparently, the NOS folks believe that both our ears and the speakers act essentially as natural filters (interpolators?), and that there is no need for digital or analog filtering. Basically, as I understand it, the values from the chip are directly translated to voltages, so that if you measured the signal it would actually look like a stair-step pattern, as opposed to smooth. I don't know much about audio engineering, but I do know quite a lot about the pitfalls of interpolation and smoothing in imaging and statistics. So, part of me at least is sympathetic with the NOS idea. I think we can make an analogy to the realm of video processing here, where we don't really have this oversampling concept. Video sources just display a discrete number of frames, and the sequence appears to have smooth motion; same idea with a flipbook. I know there are other reasons for oversampling, but I think those drop out, once the filters are removed from the equation.
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