Re: [LAD] JACK + PA Latency

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To: <linux-audio-dev@...>
Date: Monday, September 30, 2013 - 12:15 pm

On Mon, September 30, 2013 9:50 pm, Fons Adriaensen wrote:

Thanks for that explanation. IIUC the variation is making it harder to get
a good reading. So the next step is figuring out why/where the variation
is happening in the first place.

It could just be this machine that is causing the inconsistent results or
it could be something in the multitude of code that is being touched in
order to send a stream from jack_delay -> pa ->ecasound ->pa ->
jack_delay.

This is why I ask for some more feedback from the LAD community.

I have written up a guide on the test process that I am using.

http://boosthardware.com/pa-jack-latency-test.txt

I'm asking for additional suggestions on how to authoritatively test this
combination and provide definitive results. I realise that it is a fairly
difficult question but it is part of a big push for wider adoption of open
source pro audio solutions so I hope that you will all feel it is worth
the effort to solve this problem too.

What I'm currently looking at is a tool that will measure the latency
between each node in the graph. Possibly extending jack_delay for that
purpose.

--
Patrick Shirkey
Boost Hardware Ltd
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Messages in current thread:
[LAD] JACK + PA Latency, Patrick Shirkey, (Fri Sep 27, 2:42 pm)
Re: [LAD] JACK + PA Latency, Fons Adriaensen, (Fri Sep 27, 3:29 pm)
Re: [LAD] JACK + PA Latency, Patrick Shirkey, (Fri Sep 27, 4:47 pm)
Re: [LAD] JACK + PA Latency, Patrick Shirkey, (Fri Sep 27, 5:09 pm)
Re: [LAD] JACK + PA Latency, Fons Adriaensen, (Fri Sep 27, 8:53 pm)
Re: [LAD] JACK + PA Latency, Patrick Shirkey, (Sun Sep 29, 7:57 am)
Re: [LAD] JACK + PA Latency, Paul Davis, (Mon Sep 30, 12:19 am)
Re: [LAD] JACK + PA Latency, Fons Adriaensen, (Mon Sep 30, 11:50 am)
Re: [LAD] JACK + PA Latency, Patrick Shirkey, (Mon Sep 30, 12:15 pm)
Re: [LAD] JACK + PA Latency, Fons Adriaensen, (Mon Sep 30, 1:30 pm)
Re: [LAD] JACK + PA Latency, Patrick Shirkey, (Mon Sep 30, 2:04 pm)
Re: [LAD] JACK + PA Latency, Fons Adriaensen, (Mon Sep 30, 3:33 pm)
Re: [LAD] JACK + PA Latency, Paul Davis, (Mon Sep 30, 3:39 pm)
Re: [LAD] JACK + PA Latency, Patrick Shirkey, (Tue Oct 1, 5:22 am)
Re: [LAD] JACK + PA Latency, Ralf Mardorf, (Tue Oct 1, 8:59 am)
Re: [LAD] JACK + PA Latency, Ralf Mardorf, (Sat Sep 28, 2:41 am)