ralphpnj wrote: > And finally: Is some amount of jitter always present regardless of > connection type?
There is always some jitter on the DAC output, because there are no perfect clocks. In some cases that jitter is affected by the connection, in others it isn't. In many systems/players/DACs there is either a memory buffer or an asynchronous sample rate converter that isolates the DAC clock from the incoming clock, and in a clean design, the connection does not influence the output jitter. We can then speculate about scenarios where the input connection affects the audio clock through induced electrical noise etc., but there I would really like to see published evidence of the effect (and there optical should have a very clear advantage). In many simpler designs, the audio clock is derived from the incoming clock when using connections such as S/PDIF (using a phase-locked loop with a low-pass filter), so the input clock jitter can affect the audio output. "To try to judge the real from the false will always be hard. In this fast-growing art of 'high fidelity' the quackery will bear a solid gilt edge that will fool many people" - Paul W Klipsch, 1953 ------------------------------------------------------------------------ Julf's Profile: http://forums.slimdevices.com/member.php?userid=42050 View this thread: http://forums.slimdevices.com/showthread.php?t=104340 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
