Phil Leigh;501965 Wrote: > Oh dear. This is just incorrect. What you are actually experiencing is > the varying ability of a CD player to accurately retrieve and replay > information from disks that were written under different circumstances. > This has nothing to do with jitter "written to the CD", as there is no > clock on a CD. Jitter in the dac might be caused by noise on the psu > lines affecting the clock quality as the servos struggle to track the > disk pit/land transitions. > However, this jitter is not burned into the disk.
Sorry, I mis-spoke. What I should have said was, "It all sounds insane, but it is just due to the different levels of jitter that appear at the DAC depending upon features of the data written to the CD that have nothing to do with which bits are recovered. One might somewhat inaccurately refer to this as 'jitter written to the CD'." That said, is it not true that the electrical signal emerging from the disk reader will depend upon the precise locations of the pit-land transitions in ways that do not affect the digital data? I.e., vary in where precisely the zero-crossings occur? I know that FIFO buffers are often used in an attempt to nullify this *sort* of thing, but it seems to be widely agreed that the simplest forms of such things don't succeed, for reasons that aren't so well understood. -- rgheck Transporter --> Pass Labs D1 --> Pass Labs Aleph 2s --> Thiel CS 1.6s Transporter --> Adcom GDA-600 --> Pass Labs B1 (DIY) --> Adcom GFA-5800 --> Thiel CS 1.6s Receiver --> T-Amp --> Monitor Audio Radius 90s Receiver --> Sony HT Receiver (Garbage) --> Monitor Audio Raduis HT Setup SqueezeboxServer on a 350MHz Pentium II with 768MB RAM, 1.5TB storage, running Centos 5.x ------------------------------------------------------------------------ rgheck's Profile: http://forums.slimdevices.com/member.php?userid=25803 View this thread: http://forums.slimdevices.com/showthread.php?t=71321 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
