Custom tag based on #AudioChannels

[Veganfloyd]

Hi, would it be possible to have a custom tag to filter by that would dichotomize the selection of files by the number of channels (as determined by #AudioChannels) to (i.) mono or stereo and (ii.) >2 channels? If so, how can I set this up? I would still want to keep the #AudioChannels tag as a separate one.