CD Recordings..... What Do U Know?


Hey,

Im just wondering.... I've heard that if you buy professional recording equipment from pro manufacturers such as tascam, your recording may come out even better then the original source in which u copied from. Well, I was just wondering.....how do recordings from PC Cdr-w's compare with the originals? Any input would be great!
puc103
Could anyone give a technical explanation of how the sound is supposed to improve ... after all its bits, 1s and 0s on the disk, and the timing (e.g. jitter) is not derived from the disk itself, but from a reference oscillator inside the CD player.
I'm not being a pain-in-the-butt skeptic type .. just really interested how the sound could possibly improve. I can only see room for degradation.
you should admit that re-recording will not be better than original in any case.
you can make it sound better if you will re-master from original tape but there you should face the copyright issues.
In digital, unlike analog, re-recording can actually make it better (not just sound better, but really technically better). Jitter occurs at both the record end and the playback end. If you can eliminate or reduce the jitter at the recording phase, then the result is a better disc that has less jitter on the playback. Now, how does this work? First assume the original disc has jitter of X. Your playback system has jitter reduction to some degree and will reduce the jitter to only 50%. Now you load the system onto a hard disc and then into RAM where it is heavily buffered, the process involves reclocking the data stream as it is written to disc. Let's say you can reduce the jitter by 90%. So now you only have 0.1X as your jitter being recorded. Now you playback and because the jitter is low you only reduce the remaining jitter by 20%. The result is playback that was original 50% of the original jitter vs the copy that is now only 8% of that original jitter. These are, of course, hypothetical numbers, but the principle is sound (no pun intended). This is one of the few areas that copies can actually be (not just sound) better than originals.
Are you saying that uneven spacing of the pits on the CD contributes to jitter during playback ?

I don't think I can believe this because data is retrieved from the CD at a different rate from the rate at which it is fed to the DAC (this must be the case since the data on the disc also contains error correction redundancies). The clock rate for data retrieval is not the same as the DAC clock rate.

Someone who knows how CD playback really works please straighten this out ... does the inherent jitter in the pit spacing on the CD (which I guess you'd see as a closing eye pattern on the opto detector) translate into greater jitter during playback ? I just can't believe it, but I concede I could be wrong.
Rives, It's rather playback system has level of jitter X but not the original CD for christ sake.
The recorded CD will than have 1.1X level of jitter played in the same system.
Yes the future high end CD players might have a memory buffer that will store info first and than play. That will take much longer waiting time for the first track to play but Yes the jitter level will be significantly reduced let's say upto 0.05X.

Mara