>>127450968
>Like if you've got either a single note in ..... it together in a couple minutes.
Or you can just take the sample in question, play it low, EQ out the fundamental and resample it.

I have a patch in serum just to get that low end rumble without bottoming out the lowend.
It's just a wavetable with alot of harmonics with a highpass at around 80 hz, then a sub oscilator one octave up that is routed directly out.