VAxx filters have fixed and quite high overdrive

[madskjeldgaard]

Describe the bug

The VAxx filters have fixed and quite high overdrive applied to them, it seems:
https://github.com/madskjeldgaard/portedplugins/blob/main/plugins/odinfilters/Korg35Filter.cpp#L96

Expected behavior
Unless explicitly applied, the overdrive should be subtle / non-existant