Fons Adriaensen wrote: > On Tue, Apr 10, 2007 at 02:20:32PM +0200, Pieter Palmers wrote: > >> Robin Gareus wrote: > > >>> 24404.495 frames ?? Inv >>> 24404.345 frames ?? >>> 24404.241 frames ?? Inv >>> 24404.181 frames ?? > > The ?? mean that jdelay doesn't trust the signal. This is confirmed > by the frequent polarity inversions - jdelay tries to find out > which of the two polarities is correct and can't decide. > > The reason could be either insufficient level (unlikely, as jdelay > can work with very noisy signals), or a frequency-dependent delay. > Jdelay uses phase measurements of a number of tones. The ?? mean > that the results are in contradiction. Try to verify the signal > path. > I'll try again with a proper setup! I've used a [left]-sennheiser headphone-speaker, and thinkpad's build-in mic ; and a Neumann Tube with the UA25. I've played with the input and output levels watching with bitscope, but could not get the '??' go away for either mic (also the built-in speaker did not do the trick). - but the measured/displayed values are consistent, even though the scale/interpretation is wrong. - anyway I did not try harder than 10 mins and did not yet read jdelays manual.. anyway, I remember playing with a non '??' jdelay - around last summer. can that be? maybe it was aliki. how old is jdelay ? ;) more later, robin PS. jdelay beats `xmms tone://12000` in the neighbor-annoyance poll: 2 vs. 1 (out of 5 here in the office)! _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo.cgi/linux-audio-user
