Impossible to create audio effects with MIDI in?

[marc-weber1]

Creating a plugin implementation with:

const INPUT_CHANNELS: usize = 2;
const OUTPUT_CHANNELS: usize = 2;

that also implements MidiReceiver creates something that is flagged by Ableton and RENoise as an instrument with sidechain, when it should be an effect with 2 input channels. Does baseplug have a manual setting for this, like JUCE? Should this be a const in the Plugin trait?