With Redbook CD standard, the Nyquist limit is close to the audible frequencies and a steep anti-aliasing filter is required. I wonder how they approach this with high rez PCM ? Do they use a steep filter close to the Nyquist frequency, or use a gentler filter slope at a lower cutoff frequency ? Are there qualitative differences in these approaches ?
Some LPs are now cut from high rez digital sources and the mastering process necessarily imposes an HF cutoff that is lower than that achievable with high rez digital. I wonder if the removal of supersonic frequencies can explain why some people prefer listening to LPs made from digital files to listening to the digital files directly.
Some LPs are now cut from high rez digital sources and the mastering process necessarily imposes an HF cutoff that is lower than that achievable with high rez digital. I wonder if the removal of supersonic frequencies can explain why some people prefer listening to LPs made from digital files to listening to the digital files directly.