[LAU] jdelay

Robin Gareus robin at gareus.org
Tue Apr 10 19:54:19 EDT 2007



Dragan Noveski wrote:
> Fons Adriaensen wrote:
>> On Wed, Apr 11, 2007 at 12:09:03AM +0200, Robin Gareus wrote:
>>  
>>> Fons Adriaensen wrote:
>>>    
>>>> I missed the start of this thread, so I don't know what exactly you
>>>> want to do... If it's measuring the latency of you soundcard, just
>>>> cocnnect line out to line in !
>>>>       
>>> yes, just measuring latency, If I can get more info it does not hurt,
>>> though.. - I just connected a mic to jdelay  and jdelay's out to a mono
>>> quaker, though now I do have a 3-way speaker but jdelay does not use the
>>> bass..
>>>     
>>
>> Why use speakers, headphones or mics ? Just use a cable !! Things should
>> work then....
>>
>>   
> hi fons, if i understand you, connecting line in (or mic in) with line out?

Hi dragan. let me answer for Fons..

> i connected now mic in with the line out and than in qjack i connected
> alsa-pcm to jdelay input, and jdelay output to alsa-playback.
> 
> i get this values:
> 
> ....
> 1055.521 ??
>  1055.521 ??
>  1055.520 ??
>  1055.519 ??
> ....
> 
> what means that?
> jack is running here with 48k, 512/4 frames/buffer.

the "??" mean that there are possible errors. check your volume level.

And it means that a complete audio cycle (in->process->out) takes
1055/48000 = 21 [ms].


robin



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