(cherry picked from commit 3749ef0)

Resolves: #19859
Resolves: #24779

This PR re-enables the low pass filter, which was disabled in #10731 (presumably to fix other issues).
This PR is a rebase of the closed PR #16448, originally authored by @handrok.

Regarding #19859 (comment):

When I tested #16448 there was a problem with Piano: on high dynamics (ff, fff) the tone didn't get any brighter as in MS3 (low pass filter didn't react on dynamic changes) @RomanPudashkin says that PR should be reworked (rebase is not enough)

I suspect the issue at that time might not have been the filter itself, but rather that the appropriate samples were not being used for different dynamics.

I believe this sample selection issue was resolved between v4.3 and v4.4. While I haven't pinpointed the exact commit, I can clearly hear the difference, and the v4.4.0 release notes state: "Dynamics now use optimal playback parameters (varies depending on sound technology) for more realistic playback," which seems relevant.

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