Re: [LAU] Dual Delta Setup

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To: drew Roberts <zotz@...>
Cc: <linux-audio-user@...>
Date: Sunday, December 30, 2012 - 2:22 pm

Actually, I've just spotted that this topic has been raised again on the
jack mailing list so perhaps this would be better followed up over there.

http://comments.gmane.org/gmane.comp.audio.jackit/26610

That said:

On Sat, Dec 29, 2012 at 01:28:47PM -0500, drew Roberts wrote:

OK, well I've tried this morning and the news on this is mixed. Sitting idle,
and clocked from S/PDIF everything works fine with alsa_in.

Running with my large ardour session which is, frankly, on the limits of
what this machine will cope with results in loads of clicks during playback.
I suppose the graph is just too big at that point.

Running with a more modest session hovering at 30% normally, pulling the
alsa_in channels (just into jack -- no connections) raises the CPU to ~55%
but there are no xruns.

So it seems that the problem is most likely in the alsa multi plugin. As an
aside I'm surprised at the extent of resource usage caused by simply having
alsa_in running. Normal, or suspicious? jack_netsource doesn't cause this
sort of load, and tweaking sample rate and the like doesn't seem to affect
things. A side-effect of it expecting to need to resample everything?

bjb

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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)