Re: [LAU] Dual Delta Setup

Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
To: Devin Anderson <surfacepatterns@...>
Cc: <linux-audio-user@...>
Date: Monday, December 31, 2012 - 1:50 am

On Sun, December 30, 2012 3:50 pm, Devin Anderson wrote:

> We were discussing this on the JACK mailing list for a while, and I

Is there any guarantee that the master device would still be ready long
enough to wait for the slave to be ready? I would think that if they are
both "started" at the same time (but if jackd only deals with the master
maybe they don't "start at the same time) there would be less than a
sample period between readiness of master and slave. If they don't then
the master could over fill (overrun) waiting for the slave to fill the
buffer. I don't know how well the hardware deals with things like this.
Having Jack deal with two devices in sync would be better. In fact jack
could have a lower load to deal with if the buffer readiness was
interleaved on purpose by Jack setting the second device half a buffer
length after the first. (just guessing there are probably reasons why I am
wrong)

When jack sets the device up (sends sample rate and buffer size) doesn't
the multi device have to send that info to both devices? Wouldn't that
start both at the same time? Making the difference between readiness
within a sample? (I ask because I don't know) When the master restarts, is
there any indication sent to the slave via s/pdif?

Thank you for the best explanation I have heard/read so far. I am glad I
don't have to resort to this at this time. I have yet to use all 6 inputs
of my D66 at once.

As a side note for anyone else with one of these devices, jack spends just
as much CPU on this device as the 1010 because the ice1712 shows all 12
inputs and 10 outputs if they are used or not. I wonder if I was to make a
fake device with fewer ports if that would make any difference. (8 in 4
out is all I can use)

--
Len Ovens
www.OvenWerks.net

_______________________________________________
Linux-audio-user mailing list
Linux-audio-user@lists.linuxaudio.org
http://lists.linuxaudio.org/listinfo/linux-audio-user

Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]

Messages in current thread:
[LAU] Dual Delta Setup, Ben Bell, (Sat Dec 29, 11:43 am)
Re: [LAU] Dual Delta Setup, drew Roberts, (Sat Dec 29, 6:29 pm)
Re: [LAU] Dual Delta Setup, Ben Bell, (Sun Dec 30, 2:22 pm)
Re: [LAU] Dual Delta Setup, Len Ovens, (Sun Dec 30, 4:55 pm)
Re: [LAU] Dual Delta Setup, Fons Adriaensen, (Sun Dec 30, 2:46 pm)
Re: [LAU] Dual Delta Setup, Ben Bell, (Sun Dec 30, 7:27 pm)
Re: [LAU] Dual Delta Setup, Fons Adriaensen, (Sun Dec 30, 11:33 pm)
Re: [LAU] Dual Delta Setup, Devin Anderson, (Sun Dec 30, 11:51 pm)
Re: [LAU] Dual Delta Setup, Len Ovens, (Mon Dec 31, 1:50 am)
Re: [LAU] Dual Delta Setup, Devin Anderson, (Mon Dec 31, 3:12 am)
Re: [LAU] Dual Delta Setup, Len Ovens, (Wed Jan 2, 11:35 pm)
Re: [LAU] Dual Delta Setup, Joe Hartley, (Thu Jan 3, 12:26 am)
Re: [LAU] Dual Delta Setup, Fons Adriaensen, (Thu Jan 3, 12:05 am)
Re: [LAU] Dual Delta Setup, Len Ovens, (Thu Jan 3, 3:15 am)
Re: [LAU] Dual Delta Setup, John Murphy, (Thu Jan 3, 5:04 am)
Re: [LAU] Dual Delta Setup, Len Ovens, (Mon Dec 31, 2:47 pm)
Re: [LAU] Dual Delta Setup, Paul Davis, (Mon Dec 31, 2:58 pm)
Re: [LAU] Dual Delta Setup, Len Ovens, (Mon Dec 31, 10:33 pm)
Re: [LAU] Dual Delta Setup, Paul Davis, (Tue Jan 1, 4:06 am)
Re: [LAU] Dual Delta Setup, Paul Davis, (Mon Dec 31, 2:03 am)
Re: [LAU] Dual Delta Setup, Devin Anderson, (Mon Dec 31, 2:40 am)
Re: [LAU] Dual Delta Setup, Fons Adriaensen, (Mon Dec 31, 9:24 am)
Re: [LAU] Dual Delta Setup, Paul Davis, (Sun Dec 30, 3:52 pm)
Re: [LAU] Dual Delta Setup, Fons Adriaensen, (Sun Dec 30, 4:27 pm)
Re: [LAU] Dual Delta Setup, Ben Bell, (Sat Dec 29, 10:35 pm)
Re: [LAU] Dual Delta Setup, Len Ovens, (Sat Dec 29, 6:23 pm)
Re: [LAU] Dual Delta Setup, Ben Bell, (Sat Dec 29, 10:31 pm)