Why does my receive audio look like this in fldigi when trying to run PSK-31? Have I done something wrong? Is this normal? I've tried adjusting audio levels up and down which does not help. I expect to see blue and yellow from 0 to just past 3khz which is what I normally see in youtube videos. fldigi 4.0.2 Windows 10 PSK-31 FT-450D connected through ct-39a cable connected to data port going through SCI-6 interface to generic USB sound card.