[LAU] using jdelay

Atte André Jensen atte.jensen at gmail.com
Thu Apr 2 05:16:39 EDT 2009


Hi

I tried measuring my latency with jdelay. Started in on the commandline, 
first it said

Signal below threshold...

Then I connected it's input to the output of system:capture_1 with my 
microphone connected and it output to the input of system:playback_1+2. 
Now I get a squareish tone and when "singing" into the microphone I get 
reading like these:
  22442.483 Inv
  58010.411 ??
  43602.390 ?? Inv
  43474.474
  43474.474 ?? Inv
Signal below threshold...
Signal below threshold...
Signal below threshold...
  25549.731 ??
  25549.731 ?? Inv
  37749.225 ??
  37749.225 ?? Inv
  37749.225 ??
  24653.357 ??
  24653.228 ?? Inv
  25677.165 ??
  11013.134 ?? Inv
  25677.153 ??
   2821.046 ?? Inv
   2821.046 ??

The man page says the values are in samples, so for instance a value of 
37749.225 should be 0.77 seconds at 48000, right? This seems bogus 
(qjackctl reports 10 ms).

What am I doing wrong?

-- 
Atte

http://atte.dk    http://modlys.dk



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