evdplancke;684391 Wrote: > I don't like the argument of bit perfect input to justify that the > quality of a source has no incidence on DAC analog output signal. How > can you pretend that a DAC circuitry is immune to any noise coming from > its inputs? > > When you read on DAC reviews that the typical output resolution of a > Sigma-Delta DAC is around 12-14 bits at most for 16 bits input > resolution and 19-20 bits for 24 bits resolution, I am wondering where > the residual error/noise signal comes from even if the input is bit > perfect. That means for me, that a DAC output is not totally immune to > (input) noise of any kind (not only jitter but also EMC/RFI, distortion > of input signal,...).
I have no idea where you read this. You can't get much more than 120dB Snr anywhere because of thermal noise in the system. That has nothing to do with the susceptibility of the dac to what you call input noise. The thermal noise eixsts in every circuit including those inside the dac. Thus even with 24 bit data the effective snr can't get much above 20 bits, but this is an absolute limit: there is no further limit on 16 bit data I have no idea why you say the "output resolution" is 12-14 bits for 16 bits input resolution. -- adamdea ------------------------------------------------------------------------ adamdea's Profile: http://forums.slimdevices.com/member.php?userid=37603 View this thread: http://forums.slimdevices.com/showthread.php?t=91322 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
