ezkcdude;153333 Wrote: > Can I inject a wee bit of real information here? Most of the DAC's that > claim to eliminate input jitter do so for a very good reason - they use > a chip which actually pretty much does that (AD1896). Now, what they > don't tell you is that the chip costs ~$17.00 and is really very easy > to implement, but hey, that's marketing. Also, the chip was designed > primarily for sample rate conversion, and jitter attenuation is just a > nice side benefit. Anyway, the DAC I built for myself uses this chip, > so I think I'm qualified to talk about it, although I don't have the > equipment necessary to do the jitter measurements myself. If you read > the data sheet for AD1896, it is very clear that jitter rejection is > very good. The tradeoff is that you have to live with your signal being > upsampled and decimated, but this is done so accurately, that it did not > concern me. Here's some text from the data sheet, and I urge anyone who > really is curious about this subject and wants to learn more to Google > "AD1896" and download the pdf from the ADI website:
Let's stick to information then: "Attenuation" is not the same as "elimination". AD's own site only claims attenuation: http://www.analog.com/en/prod/0,,765_807_AD1896,00.html Claims of jitter rejection is marketing hype, and AD dosen't do this themselves, for obvious reasons (they would be lying). There is no "pretty much" rejection -either source jitter is rejected or it isn't. If it is not rejected it may be attenuated, but I don't see any figures on this attenuation in these DAC manufacturers' specifications. Here is more detailed discussion on the subject: http://www6.head-fi.org/forums/showthread.php?t=155240 -- P Floding ------------------------------------------------------------------------ P Floding's Profile: http://forums.slimdevices.com/member.php?userid=2932 View this thread: http://forums.slimdevices.com/showthread.php?t=29450 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
