Sorry about that. I've put up with a lot of knuckleheads through the years who always want to challenge things for no good reason. Always trying to put you down. My mistake.
The flatwounds from years ago sounded nothing like the ones made today. They had very little tone and no sustain. A lot of bass players used a pick to get the notes to start. Listen to old Lawrence Welk shows where that was done a lot.
If those strings were still around today it would be great for bass players who want that old rock bass sound as well as upright. Best thing to do, no matter the string, is to turn the treble tone way down, bass tone flat or up slightly, put a foam or cloth pad under the strings just ahead of the bridge and pluck with fingers or pick over the fretboard. Experiment with it. I use four settings that sound pretty good.