Mnyb wrote: > Archimago , I do have a theory about why the upsampling behaves so weird > on your DAC , it's intentional otherwise no one would hear any > difference when pressing that button :) and users would complain .
I thought about that possibility as well when testing the ASUS Essence One. Certainly it could be intentional that they selected a filter that low-passed at 15kHz to remove the high-end "harshness" to perhaps sound a little NOS-like... Obviously IMO, they went WAAAAY overboard! I also checked the impulse response and it's clear they're still using a linear phase filter. When I raised this issue on the head-fi forum, this was what I got from 'ASUSXONAR' (I guess one of their reps there): "We have been looking into this. During development we were given a choice of four different filter options (not all at the same time obviously). The current filter was chosen and it favors high sampling rates (88KHz upwards), the side effect being the sharp cut-off for lower sampling rates. We're working with the developer and discussing a new filter that is less aggressive at lower sampling rates. There are side effects to every choice, but we'll try and do something that is more universal." Hmmm... I always thought upsampling was for the purpose of improving quality of the lower sampling rates - why would anyone want to "favour" 88kHz and above!? Well, I hope they make it right with a new firmware upgrade. ------------------------------------------------------------------------ Archimago's Profile: http://forums.slimdevices.com/member.php?userid=2207 View this thread: http://forums.slimdevices.com/showthread.php?t=97950 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
