Re: [LAU] different latency with cadence and qjackct

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To: <linux-audio-user@...>
Date: Monday, March 4, 2013 - 10:27 pm

On Mon, Mar 04, 2013 at 10:53:30PM +0100, Chris Bungue wrote:

> I work with KXstudio and Unbuntu 12.04. Normally I think is on

Depending on how you define latency both could be right.

Qjackctl shows the sum of input and output latency - the time a
signal takes from an input of your soundcard to an output if
you connect the corrsponding Jack ports [1].

I don't know Cadence but apparently it shows just the input
and/or output latency separately, or it gets it wrong.
If you use -n 2 (2 periods) then input and output latency
are equal. If n > 2 then they are not, and Cadence *should*
show two different values, and the sum of those should be the
value shown by Qjackctl.

So try -n 3 and see what Cadence tells you...

[1] ignoring any additional HW delays that ALSA/Jack/Qjackctl
don't know about. You can measure the real delay using jack_delay.

Ciao,

--
FA

A world of exhaustive, reliable metadata would be an utopia.
It's also a pipe-dream, founded on self-delusion, nerd hubris
and hysterically inflated market opportunities. (Cory Doctorow)

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Messages in current thread:
[LAU] different latency with cadence and qjackct, Chris Bungue, (Mon Mar 4, 9:53 pm)
Re: [LAU] different latency with cadence and qjackct, Fons Adriaensen, (Mon Mar 4, 10:27 pm)