DSP mono/stereo-confusion for effects on busses

S2400
1

I am mono/stereo-confused regarding the 8 busses the DSP mixer.
I’ve looked in the manual, so there must be some lack of understanding for my part.

Point 4 below is where I am lost. Hope someone can help me out?

  1. Load a mono sample on “Track A1”
  2. Set “Track A1” output to “1” (DSP Bus 1)
  3. Load a stereo effect (e.g. a reverb) on “DSP Bus 1”
  4. The reverb now plays in stereo. Not unexpected, as it is a stereo effect. But, it doesn’t change anything, when I switch between “Mono” or “Stereo” for the “Mix”-parameter under the “DSP Bus 1 Settings”. I would think, that when switching to “Mono”, the channel and thereby the stereo-image would maybe collide to mono. But it remains stereo no matter which settings I try.

Also, if this is how it is supposed to act, are there a way, to get a bus with a stereo effect, to play in mono?

(I can of course look if there exist a plug which can make stereo to mono to put after, but would like to see, if it’s possible without.)