[LAT] Document on using Jack Apps

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To: <linux-audio-tuning@...>
Date: Saturday, July 31, 2010 - 10:23 pm

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Hello:

I am very much new to Linux and Linux audio. I am trying to measure audio
IO latency for my system.
Jdelay seems to be the right tool but when I run it on the terminal, I am
getting message "Signal below threshold..." which probably might be because
Jack is trying to capture audio and ends up getting the low noise floor
because I do not have meaningful signal source connected. But then I tried
to patch the this App to the qJACKctl app but the settings console is
not straight forward to interpret. as it involved many parameters.

I guess there are # of frames per period that may eventually be used
to calculate the target latency but *is there a step-by step document
description for Jdelay and any other JACK tools and also using JACK audio
server in an effective manner*? Also, qJACKctl console does not offer
options for very low sampling rates like 8 KHz. With ALSA, this should be
possible but may be this particular tool does not support it. Can anyone
help here?

Thanks,
-F

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Hel=
lo:
I am very much new to Linux and Linux audio. =A0I am trying =
to measure audio IO latency for my system.Jdelay seems to be the right=
tool but when I run it on the terminal, I am getting message "Signal =
below threshold..." which probably might be because Jack is trying to =
capture audio and ends up getting the low noise floor because I do not have=
meaningful signal source connected. =A0But then I tried to patch the this =
App to the qJACKctl app but the settings console is not=A0straight=A0forwar=
d to interpret. as it involved many parameters.
I guess there are # of frames per period that may event=
ually be used to=A0calculate=A0the target latency but=A0is there a step-=
by step document description for Jdelay and any other JACK tools and also u=
sing JACK audio server in an effective manner? =A0Also, qJACKctl consol=
e does not offer options for very low sampling rates like 8 KHz. =A0With AL=
SA, this should be possible but may be this particular tool does not suppor=
t it. =A0Can anyone help here?
Thanks,-F

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[LAT] Document on using Jack Apps, Arvind Venkatasubramanian..., (Sat Jul 31, 10:23 pm)
[LAT] rt kernel 2.6.39, Emanuel Rumpf, (Sun May 29, 11:56 am)
[LAT] To much latency, Dave Stikkolorum, (Sun Oct 30, 11:02 am)
[LAT] 3.x kernel, Emanuel Rumpf, (Wed May 2, 8:48 pm)
Re: [LAT] 3.x kernel, Robin Gareus, (Wed May 2, 8:51 pm)
Re: [LAT] To much latency, Jeremy Jongepier, (Sun Oct 30, 11:25 am)
Re: [LAT] To much latency, Dave Stikkolorum, (Sun Oct 30, 11:55 am)
Re: [LAT] To much latency, Jeremy Jongepier, (Sun Oct 30, 12:03 pm)
Re: [LAT] To much latency, Dave Stikkolorum, (Sun Oct 30, 12:23 pm)
Re: [LAT] To much latency, Jeremy Jongepier, (Sun Oct 30, 1:50 pm)
Re: [LAT] To much latency, Dave Stikkolorum, (Sun Oct 30, 2:13 pm)
Re: [LAT] To much latency, Jeremy Jongepier, (Sun Oct 30, 2:19 pm)
Re: [LAT] To much latency, Dave Stikkolorum, (Sun Oct 30, 2:39 pm)
Re: [LAT] To much latency, Jeremy Jongepier, (Mon Oct 31, 11:59 am)
Re: [LAT] To much latency, Dave Stikkolorum, (Tue Nov 1, 4:17 pm)
Re: [LAT] To much latency, Jeremy Jongepier, (Wed Nov 2, 5:34 pm)
Re: [LAT] To much latency, Rafael Vega, (Tue Nov 1, 12:25 am)
Re: [LAT] To much latency, Daniel James, (Tue Nov 1, 10:04 am)
Re: [LAT] To much latency, Rafael Vega, (Thu Nov 3, 12:33 pm)
Re: [LAT] To much latency, email.rafa@gmail.com, (Thu Dec 22, 2:50 pm)
Re: [LAT] rt kernel 2.6.39, Robin Gareus, (Sun May 29, 1:43 pm)
Re: [LAT] rt kernel 2.6.39, Emanuel Rumpf, (Sun May 29, 2:39 pm)
Re: [LAT] rt kernel 2.6.39, Robin Gareus, (Mon May 30, 3:52 pm)
Re: [LAT] Document on using Jack Apps, Daniel James, (Tue Aug 3, 6:48 pm)
Re: [LAT] [LAU] Are RT-patches needed anymore? (Was Re: &gt;..., Lars-Erik Helander, (Mon Feb 2, 8:53 am)
Re: [LAT] [LAU] Are RT-patches needed anymore? (Was Re: &gt;..., Fernando Lopez-Lezcano, (Mon Feb 2, 6:35 pm)