[PD] about latency

[vanDongen/Gilcher]

If I understand you correctly, you want to play along with an audiofile and 
then send the mix over the net to somebody else to add his/her part, and you 
want some kind of automatic latency detection so you can adjust the delay you 
need to add to the soundfile input.

Did you check out the latency test in the pd tools directory?
It gives you an estimate of the roundtrip latency. 
Since you also need the roundtrip latency (file output + live input) you could 
use this number. 

Or you can record both your playing and rerecord the soundfile to a new file 
from the adc~. Basically recording what you are hearing. It adds one more 
dac-adc pass but that may not be so bad. Depending on your sound card and the 
number of overdubs of course.

hope this helps
Gerard





On Thursday 17 July 2003 18:58, Alex wrote:

> I have built a patch that allow me to play with other musicians on the
> Internet so it is very important (for resync purposes) that we know
> precisely the latency of our different systems. So far we guessed it
> while sound checking but I wonder if I could do a single patch that
> would tell me in ms how big is the lag just by loading it. (without
> having to record and then go into a sound editor). If somebody has an
> idea it will be great to share it.
>
> Thanks a lot.
> Alex