Just some guesswork:
We may need an option to compensate the delay between audio input
(to the soundcard), and the time read by WSJT-X from the PC's system
clock. Since Stefan uses Spectrum Lab as an 'input preprocessor',
plus a virtual audio cable, the total delay may be too much (in SL,
very long FFTs and inverse FFTs are sometimes used for audio
processing, which introduces delays over one second. The ultimate
solution would be to feed timestamped data into the WSJT decoder,
but a simple input field (in 'seconds added to the PC's system time)
to compensate such a delay manually would also be ok.
Here, with WSJT-X directly connected to the soundcard's input, I
receive some overs with almost perfect sync but no text decoded.
Unfortunately wave-file-logging was turned off at that time:
73,
Wolf DL4YHF .
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