Mnyb;614595 Wrote: > ? I was under the impression that majority of the eventual improvement > is in the increased bith depth ? As this would increase the signal > content that we stand a chance to hear. > > I know what a brick wall fillter is, but this is nowdays only a factor > during recording then the frequency must be high to avoid that,. > But for playback at home most modern DAC's have massive oversampling so > for playback this is not really a problem anymore. > >
For any kind of oversampling to occur without gross errors, there needs to be a very sharp low pass filter (usually done in the digital domain). There is nothing quite like this high order, low pass filter in natural acoustic spaces, which is why low sample rate PCM recordings always sound like something's wrong with them, IMO. The counter argument is that our ears have the bandwidth limitation, so that is doesn't matter if the reproduction system has a compatible bandwidth limitation. The reason I think otherwise is that we humans have a very non-linear perception of audio amplitude, and we can detect wrong timing of transient events even though we may not have the corresponding ability to detect continuous high frequency tones. For a purely linear system, this would be nonsense, since bandwidth and timing resolution are inextricably linked as reciprocal quantities in linear signal processing. Nevertheless, it is my conjecture that a higher than 20kHz bandwidth audio channel is necessary to avoid that our sensitive, non-linear ears pick up disconcerting, not-found-in-nature timing cues that cause us to identify the music source as electronic, unnatural and perhaps even fatiguing for long-term listening. I guess I am setting myself up for several flames for writing this post. However, I am just sharing an opinion. -- dsdreamer ---------------------- "Dreamer, easy in the chair that really fits you..." ------------------------------------------------------------------------ dsdreamer's Profile: http://forums.slimdevices.com/member.php?userid=12588 View this thread: http://forums.slimdevices.com/showthread.php?t=85879 _______________________________________________ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/discuss
