How do I turn off the microphone high-pass filter for more bass pick-up?

I've got an LG Phoenix 4 running Android 8.1 (AT&T prepaid, used as tablet only for now).

The mic seems to cut off bass around 100 Hz and I can't find a way (in main Android settings) to allow its full range.
I've also tried various recording apps looking for a setting but so far no luck.

In my old Nokia (Windows) phones there was an obvious setting to turn off the bass-cut feature, and I'd rather have maximum realism in recordings than cut out rumble.

Thanks for any tips if it's doable in Android.