Stereo - swap channels

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I wonder if it's possible to swap channels L->R, R->L easily in LMMS. Obviously if this is a one off it's fairly trivial, but I'm thinking of what some might think a fairly unusual use.

Imagine an orchestra - typically violins on the left, cellos and double basses on the right. In a real physical environment it would be impractical to swap the instruments over quickly. What I'm thinking of is a mix in which a section had the spatial locations reversed L<->R, and this could be triggered by a marker in the time line. The swap over could be instantaneous. It would also be possible to mix the result of this with the original to get another effect.

There are two cases of this - for audio tracks and for Midi tracks. Although this might not be considered a worthwhile effect, I can think of definite uses for it.

Besides working with the output, it would also be feasible to do this using buses, but if it could be done at the stereo track level, rather than having to route audio via buses that might be helpful for some creative workers.

This effect would really only work for stereo outputs - though it could be a sub-feature of surround sounce. Effects in surround sound could include rotating the soundfield and also reflecting it about a line or plane, but I'm assuing that in the first instance it would be easiest and possibly most useful for stereo.
dave2002-lmms wrote:
Fri Jul 17, 2020 11:05 am
I wonder if it's possible to swap channels L->R, R->L easily in LMMS.
Yes, you use stereo-matrix There is even a LMMS-plugin for that
I just looked at one of the more complicated videos about the matrix. Is it possible to specify the values precisely - or just use the knob positions - possibly less preceise?
dave2002-lmms wrote:
Sat Jul 18, 2020 11:33 am
possible to specify the values precisely
Afair you can double-click any Dial and insert precise values
Try that
Afair you can double-click any Dial and insert precise values
Try that
Indeed, double clicking works as you suggest.

Also a CTRL-click gives a menu. What is less obvious there is the switching between linear and logarithmic scales. If I change the scales to logarithmic, the visual appearance changes.

My guess is that it makes no difference to the number values which get put into the "knobs", but just the visual appearance on the screen - but I could be wrong. It'd be good to know - I think.