What I mean is does the amount of jitter vary for different types of connection?
\"YES\" So is there more or less jitter present in a USB connection than in a coax connection? \"IT DEPENDS ON THE TYPE OF USB AND CAN BE IMPLEMENTATION DEPENDENT YOU CAN NOT SAY UNLESS YOU HAVE TWO MEASURED EXAMPLES TO COMPARE . HOWEVER ASYNCHRONOUS USB 2 MAKES IT SOURCE INDEPENDENT AND IT'S JUST WHAT THE DAC DOES THAT'S MATTER \" More or less jitter present in a coax connection than in an Ethernet connection? \"N/A ETHERNET IS NOT THAT KIND OF INTERFACE . THE COAX SPDIFF INTERFACE HAS THIS . ETHERNET IS ALWAYS ASYCHROUNUAS AND BUFFERED FOR OUR PURPOSES\" More or less jitter present in an Ethernet connection than in file played from a memory buffer? \"N/A YOU CAN NOT PLAY DIRECTLY FROM ETHERNET , THERE IS ALWAYS AN OS AND A MEMORY INVOLVED . IT'S LIKE ASKING IF A DOWNLOADED FILE GETS MORE JITTER OVER TIME ;) SO THESE TWO ARE THE SAME YOU ARE PLAYING FROM A MEMORY BUFFER WITH ETHERNET , PULL THE WIRE FROM YOUR SQUEEZEBOX AND IT WILL PLAY FOR ALMOST 30 SECONDS\" More or less jitter present in a file played from a standard hard drive or a file played from an SSD? \"N/A THAT'S NOT HOW THINGS WORK, NOT IN A DIRECT WAY THAT REALLY MATTERS\" More or less jitter present in a file from an SSD or a file played from RAM? \"N/A THAT'S NOT HOW THINGS WORK, NOT IN A DIRECT WAY THAT REALLY MATTERS\" And finally: Is some amount of jitter always present regardless of connection type? A TENTATIVE YES , BUT THE KEY IS A CONNECTION THAT'S TIMING DEPENDENT , THIS IS USUALLY BETWEEN DIFFERENT MACHINES AND WITH PRIMITIVE INTERFACES LIKE SPDIFF WHERE A TIME BASE IS DERIVED FROM THE SIGNAL ITSELF . THE DAC SYNC ITS PLAYBACK ONTO THE 44.1 IT CAN DERIVE FROM THE SPDIFF CARRIER Please note: I am not trolling, I am trying to get a better understanding of jitter and what causes jitter in the first place. \"ITS NOISE IN THE TIMING OF A SIGNAL BUT THE CONTEXT IS IN AN INTERFACE WHERE IT'S MATTERS . LIKE IN DA CONVERSION WHERE THE DAC TURNS A 16 BIT WORD INTO A VOLTAGE EVERY 1/44.1 SECOND THE TIMING OF THIS MUST BE PRECISE, NOTE MY EXAMPLE IS SIMPLIFIED DAC ARE MORE INVOLVED THESE DAYS\" -"But this is more or less a solved problem it's not present in audible quantities in modern DAC's and the question does not really apply to what's going on inside a computer . It's a popular marketing term as it can always be improved in minute increments ;) "- -------------------------------------------------------------------- Main hifi: Touch + CIA PS +MeridianG68J MeridianHD621 MeridianG98DH 2 x MeridianDSP5200 MeridianDSP5200HC 2 xMeridianDSP3100 +Rel Stadium 3 sub. Bedroom/Office: Boom Kitchen: Touch + powered Fostex PM0.4 Misc use: Radio (with battery) iPad1 with iPengHD & SqueezePad (spares Touch, SB3, reciever ,controller ) server HP proliant micro server N36L with ClearOS Linux http://people.xiph.org/~xiphmont/demo/neil-young.html ------------------------------------------------------------------------ Mnyb's Profile: http://forums.slimdevices.com/member.php?userid=4143 View this thread: http://forums.slimdevices.com/showthread.php?t=104340 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
