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Old 12-29-2013, 09:16 PM   #1
MisterBark
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Question MUSIC: jacknet and soundcard at different clocks?


Hi,

Let's say I have a LinuxSampler machine with jacknet slave ports.
Let's say I also have a soundcard on this machine with a BNC (or ADAT) wordclock input.

Can I setup the machine so the out ports of jacknet run at the clock set by the jacknet master on the network, while the out ports of the soundcard run at the clock set by Word clock input?

Last edited by MisterBark; 01-01-2014 at 05:47 PM.
 
Old 12-31-2013, 09:59 AM   #2
jefro
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If I understand what you want. I'll go out on a limb and say no. A master recording studio might have a master time clock. Transmission buildings and even ships would. Pretty sure there is no way to do this in a home setup. I could be wrong.

What I'm thinking of is a high precision signal maybe to 3 beats per year where all signal activity is set to that source.


What I am thinking that you are having issues with is the various latency with how one sound card works versus another source. You might be able to use delays or work around it. Even on a i7 fast system my hardware sound card has a bit of latency when playing to a song. I just move the entire track if I need them to be more precise.
 
Old 12-31-2013, 08:14 PM   #3
MisterBark
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Ok maybe I wasn't very clear in explaining out of the context.
It does not seem that we talk about the same thing.

I am talking about "Word clock" for professional audio converters / soundcards.
Do you know what this is?
It is the clock that says "the next audio sample is NOW". Running at 44.1, 96, 192KHz e.g.
Every card is fed that way by either its internal clock, or a BNC Word Clock input for more accuracy (Apogee Big Bend e.g.)

What I am wondering is if this clock can be different from jack's perspective when jack handles both the clock of a soundcard, and the one of a remote jacknet master.

Now, my guess is that a clock in a purely hardware thing, and that softwares (jack/kernel) buffer all this so it should not matter... but jacknet is a very special thing... it's not really like a soundcard.

Maybe my question is too specific... Anyone knows where to ask this type of thing?
Thanks!

Last edited by MisterBark; 01-01-2014 at 05:47 PM.
 
  


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