Slanted pictures means there is a slight mismatch in the sound card,
or dedicated hardware, sampling rates. I am not familiar with the
program you are using, but look for some information on calibration,
sample rate, or possibly alignment. Once you tweak that, you should
be fine. WEFAX transmissions are usually good, and experienced SSTV
users quickly get their equipment adjusted.


--
Alan
WA4SCA