Originally Posted by brat
Elucidate the above, please!
"Another unique feature of the MPD-3 is its ability to playback super high resolution files of up to 24/384kHz PCM": - Resolution in digital audio is defined by bit depth, 24/384 has exactly the same resolution as 24/192 and 24/94. All that higher sample rates allow for is the theoretical recording of higher frequencies. So, 384kHz sample rate allows for the theoretical recording of frequencies twice as high as a 192kHz sample rate but at the same resolution. I say theoretical recording because no studio microphone can record frequencies so high and no sound is produced by instruments so high. So 24/384 is not super high resolution. In fact fidelity is poorer at sample rates of 192kHz and higher. This is not only accepted in science but by manufacturers themselves (Apogee, Benchmark, Lavry, Prism).
"This is 32 times the resolution of players with the ability to playback 192kHz high resolution files.": - This is a lie. As explained above sample rate is not resolution, bit depth is. The truth of the matter is that this DAC is not even able to resolve 24bit, no DAC in the world is, as 24bit resolution is beyond the laws of physics to resolve in any real world circuit.
"Apodizing filters are special upsampling filters that compensate for some of the ringing effects caused by brickwall filters in the Analog to Digital Converters (A/D) used during recording.": - Filter ringing in ADC filters is very old history and was effectively eliminated in professional ADCs many years ago.
"Depending on the recordings apodizing filters can provide audible improvements.": - Misleading, the digital audio recordings would probably have to be roughly 20 years old for you to stand a chance of audible improvements using an apodizing filter.
"Since brickwalls in A/D converters are akin to edges on dish antennas the same principle holds for digital audio and similar filters can be used in DACs with noticeable improvements." : - That's a strange coincidence because my ADC looks just like an antenna dish (not)! Filter ringing has been virtually eliminated at recording rates of 24/96. Even if there was a whole boat load of ringing, it would occur at about 40kHz, at least two times higher than any adult human can hear. So how you could hear "noticeable improvements" in a frequency range so far outside of human hearing must be some kind of magic.
GEdited by gregorio - 8/29/11 at 12:00pm