vett93;686157 Wrote: > It is often easy to quote some theory we knew from the past without > verification. It also can be hard to verify the operating condition. > For example, how do we know the error rate between the source and the > DAC is zero? I am guessing that the error rate is probably not zero. If > that is true, it is possible to do some tweaks on the source to reduce > the error rate.
I think you are right. If I remember well the theory, given a signal to noise ratio and a type of modulation, we can calculate the probability of error (bit error rate). When we add noise to a signal, this probability is very close but not equal to 0. The question is: at what level the bit error rate becomes audible? can we hear a bit error rate of 1E-10 for instance? Another question: is a DAC totally immune to analog noise that is added to its digital input (EMI, temperature noise,...)? I would tend to say no, if there is no galvanic isolation between input and output. Am I wrong? If not, this could explain why source CPU load could have indirect incidence on analog output noise. Bit perfect means that the signal can be almost perfectly reconstructed when there is a good jitter rejection but the noise of the DAC circuitry should be added to the signal including potential noise transferred from the input if any. -- evdplancke ------------------------------------------------------------------------ evdplancke's Profile: http://forums.slimdevices.com/member.php?userid=43147 View this thread: http://forums.slimdevices.com/showthread.php?t=91322 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
