SmartSDR defaults to LSB on 160, 80 and 40 with WSJT-X

Kevin First you should be using DIGU. Second perhaps a profile setup for WSJT could help

+1 on both that Mark suggested.  In WSJT-X check the item "Data/Pkt" instead of USB.  the DIGU mode is best since it disables all audio filtering, which you DON'T want when running digital modes.  Also, profiles are your friend - makes life a lot easier to reconfigure the radio for digital then switch back to your usual mode (SSB or CW, perhaps) by having a profile for that mode.  It saves fiddling with all the settings!

Kevin,

DIGU is another "mode" available like CW, USB, LSB, DIGL, DIGU etc.... 

As Greg said below:   DIGU is nice because it disables ALL EQ and filtering of the audio.   Your audio input would likely be DAX so you would have mode set to DIGU, DAX Button on, this would be pretty much a pure digital path from WSJT-X to SSDR.

Greg has a post below on profiles.  Basically you can setup a "profile" which is a set of remembered settings for each kind of thing you do.   I have:

40mCW profile that sets all modes, frequencies, pans, slices, output etc for CW ops on 40m.

I also have a 40mFT8 which does the same thing but moves the frequency to 7.074 and sets DIGU, DAX input etc.  It also sets the slice filter to be like 0 to 6000 hz.

So I think those are the way to go.   

Yep.  That's the ticket.... in WSJT-X Config, set it to Data/Pkt and it will always change to the correct mode when you change bands in WSJT-X.

ALSO.  Set up and save Mic Profile for WSJT-X with TX Hi/Lo as 0 / 3000  (or 0 / 5000 if you also plan to use the combined JT modes).  Have it set MON to ON at a low to mid level if you want to monitor your TX audio to make sure you are transmitting OK.  Then after selecting DigU for the first time, select that Mic Profile, and it will remember to link that profile to DigU and you won't mess up your SSB Mic Profiles.

When you switch back to USB/LSB, it will remember your last used SSB profile.

Ken - NM9P