linuxaudio.org

On 07/31/2010 11:23 PM, Arvind Venkatasubramanian wrote:

quoted text
> 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?

> 

re. qjackctl settings you can actually write whatever sample-rate you

want. you're not limited to the options given in the drop-down list.

however, that doesn't mean that the soundcard will stick to it, ever :)
cheers

--

rncbc aka Rui Nuno Capela

rncbc@rncbc.org

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