🚀 go-pugleaf

      There is a lot of research that seems to suggest Nyquist is only half
      the story, and to accurately reproduce all the nuances without any form
      of aliasing at all, we need to use 3x highest frequency and not 2x.




Nyquist isn't actually wrong - but the direct implementation of what he said has always left plenty to be desired. It isn't necessary to go to the extent of raising the sample rate to achieve a better performance, though - you can remove the nastier artefacts of brickwall filters simply by oversampling at the D-A stage and noise shaping the resulting signal. This invariably gets away from the phase problems that the brickwall filters introduce, and a correctly implemented scheme sounds far better at lower sample rates than not bothering, and using the brickwall approach. A lot of these issues are a legacy of the initial approach to digital reproduction, which was touted as being 'perfect' when it was anything but, and this has unfortunately opened the doors for a lot of suspicion about everything that's happened to improve the situation since. And as a result, also a lot of Snake Oil...