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CDP tray versa HD playback, once again
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Posted on April 28, 2008 at 12:56:08 | ||
Posts: 273
Joined: September 25, 2006 |
I did a number of comparative tests that resulted in a conclusion beyond a reasonable doubt :) Setup: PC based transport built for this purpose only, to the best of my abilities and knowledge (completely fanless, all non-essential HW/SW disabled, Lynx L22 soundcard). Wadia player with digital input fed from mentioned Lynx. A number of CDs were ripped and stored on PC HD as wave files. Compared playback of same tracks from CDP tray and from PC. Results were not consistent, sometimes preference was the tray, sometimes PC. In those cases where PC was preferred (and there were many), I realized that during the ripping process, EAC was not able to read everything in a single pass, errors were accumulating, and it was re-reading tracks. My understanding is that EAC, if setup in such a way, will make several reading attempts, and in case all are bad, even try to pick the most intact sector from each pass, even perform computation based on values from all passes. On the other hand, tray is real time deal, and ECC is not always capable of correcting the information. Consequently, my conclusion was that in such cases the process of ripping and later playing from PC indeed results in more accurate information being presented for conversion to analog signal, despite assumed higher jitter from Lynx, and for this reason I preferred PC playback. The number of such disks/tracks was surprisingly large. Even brand new, supposedly well pressed CDs of high quality (and expensive) exhibited this reading problem. Very few of them were of 100% quality when ripped, and those were generally preferred through tray. Does this make sense? |
RE: CDP tray versa HD playback, once again, posted on April 28, 2008 at 15:56:18 | |
Posts: 273
Joined: September 25, 2006 |
Yes, that is it. BTW Wadia has no ability to output clock. |
Here is a test, posted on April 28, 2008 at 17:49:12 | |
make an .iso image of a CD, then play it back from your HD via Deamon tools. |
RE: Magic in the sense of Clarke's Third Law, posted on April 28, 2008 at 18:52:51 | |
Posts: 273
Joined: September 25, 2006 |
That is my thinking as well. |
RE: Here is a test, posted on April 29, 2008 at 06:50:41 | |
Posts: 273
Joined: September 25, 2006 |
I use WaveLab, found it much better than anything else. |