Ways for multichannel cutoff & resonance controls

[Relabsoluness]

Given a need to simultaneously control cutoff & resonance on multiple or all channels, is there any feasible way to achieve such without resorting to plugins? If not, since there already are some internal plugins, would it make sense that have also cutoff/resonance as such or perhaps a plugin to controls channel properties through PC notes?

[Saga Musix]

Using plugins is the only easy way to do that at the moment. The current filter infrastructure is too limited, so going forward with plugins is the only sensible thing to do. I started working on a filter plugin a long while ago but it was never finished.

[Relabsoluness]

Thanks, need to look at filter plugins then. If it's easy to briefly describe what is the main obstacle with the plugin, it would be interesting to hear; a layman could be inclined to think that applying filter to input of a plugin could be somewhat similar to applying it to single channel.

[Saga Musix]

Technically it's not a challenge; but I want the plugin to be more than just the limited IT filters; it should contain a good library of different filter types, with configurable steepness, optimally also with a visual representation of the filter curve. Essentially what I want is a built-in version of Electri-Q.