> You want something that dejitters. Jitter is only cumulative if nothing > reclocks the signal. Devices like the Monarchy DIP do exactly that. > DACs such as the Benchmark DAC 1, (probably) your dCS, and several > others also reclock the incoming signal. This is possible because there > are fixed, standard input rates and once the proper one is determined a > high precision clock in the receiver and be used to match the input > signal to one of the set frequencies.Sadly, it's not quite as simple as that.
Even where you have two clocks of nominally the same frequency, they will always drift slightly unless you lock them together. At digital audio data rates, this drift is quite significant. If you lock the input clock with the DAC clock, you will transfer some of the jitter from the input clock into the DAC clock. How much, depends on the characteristics of your PLL. The DAC1 uses Asynchronous Sample Rate Conversion to convert the input data stream into a data stream at a completely different frequency. To do this it has to determine the timing relationship of the incoming data, with its own (asynchronous) output data, and then apply a digital filter to generate (interpolate) the output samples from the input data. IME, it's incredibly difficult to remove an artifact once you have introduced it: far better not to introduce it in the first place. -- Patrick Dixon www.at-tunes.co.uk ------------------------------------------------------------------------ Patrick Dixon's Profile: http://forums.slimdevices.com/member.php?userid=90 View this thread: http://forums.slimdevices.com/showthread.php?t=20284 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
