WEFAX/FLDIGI decode problem 9/8/15

[flexoman61]

I'm having a decode error with WEFAX in
FLDIGI.

Image skews throughout decode, about 90% of the time. Attached is a small
image but you can see whats happening.

I don't want to just start changing settings, cuz I don't really know what I'm doing.

I have my suspicions of the cause, but I'm hoping that this is something that has been
seen before with an easy fix. I have always had good answers to my lame computer problems here on HFU.

I'm using,
-windows 8.1
-FLDIGI 3.22.05
-StarTech USB to stereo Audio External sound card, part # ICUSBAUDIOB

Thanks for ANY help

[robman501a]

Yeah same here. Not to sure what is going on.

[Oliver]

Check the link for FldigiHelp: http://www.w1hkj.com/FldigiHelp-3.21/html/wefax_page.html

and also http://www.hfunderground.com/wiki/Maritime_Fax_Transmissions

[ka1iic]

Hummm

Try shutting off the 'red' button to the right of the horizontal align slider...  just above the waterfall... then align manually with the slider that might help...

[refmo]

I had that problem when I upgraded to Windows7, seemed to be caused by the virtual audio card I was using to patch the SDR audio into my decoding software.
'VB-Cable' seems to do much better, although since Windows upgraded me to Windows10, my sound card timing seems to have changed.  I need to re-calibrate.
Not sure if they allow links from outside sites, but here is a link to the VB-Cable download:
  http://vbaudio.jcedeveloppement.com/Download_CABLE/VBCABLE_Driver_Pack43.zip

or view their site to read more info:  http://vb-audio.pagesperso-orange.fr/Cable/index.htm

[flexoman61]

Well, since my original post of this problem I have had no luck fixing this "Jitter".
I have been looking for a new external usb soundcard to try.

Recently I had to replace the RAM on my laptop. After that I reinstalled my soundcard
and the audio input level, gain I guess, into FLDIGI was very high. The Diamond shaped
indicator on bottom of screen showing the audio input level was Red, instead of green,
saying audio in is too high. I was unable to fix this and tried it anyway.

Wefax has decoded perfectly since, every time. I was getting some kind of interference
from my laptop occasionally, about every five minutes or so. I could hear on sound recordings,
and would last for a few seconds. Enough to skew my image decode. I think with all the extra gain
from sound card the interference is not heard by FLDIGI. Or the new RAM has solved the problem.

Either way it's working fine.