Functionally almost done?

waterfallMarker

Click any place on the lower half of the waterfall, generated by Soft66LC4 with its LO at 7020kHz, and IC-7410 will be tuned to that frequency, which you can observe ty the dark marker in the middle. Each of the three markers on the upper edge shows the baseband frequencies of 400Hz/600Hz/800Hz, respectively.

% sprigmm /dev/ttyUSB0 hw:2,0 16000 1 hw:0,0 48000 2

Note that although the FFT size is the same, the sampling frequencies differ between the two receivers.

The mode of IC-7410 is currently “CW”, receiving the lower side band, so only the lower side band is shown on the upper half.