10 Apr
2007
10 Apr
'07
3:04 p.m.
Fons Adriaensen wrote:
On Tue, Apr 10, 2007 at 02:20:32PM +0200, Pieter
Palmers wrote:
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)!
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.