Hmmm... Okay. I think I'm going to start over from the beginning; I think I asked the question wrong to begin with.
First, my assumptions and a bit of preamble:
Whenever I use the context menu in the Track view to add a new track in Sonar, whether MIDI or audio, Sonar always adds a stereo track.
But shouldn't these tracks be mono by default?
In books such as "Mixing Secrets for the Small Studio" Mike Senior and others talk as if the default track type created by a DAW is mono. At least, that's the impression I got.
Well, most of the time when I record (for instance) one of my acoustic guitars, it's only being recorded with one mike through a single channel on my Mackie board, but by the time it gets to Sonar, it's stereo because the default track type is stereo.
And now the big question:
If these tracks are stereo by default for no (IMO) apparent reason, should I be converting them to mono? (Please note I'm not talking about recording stereo instruments, I'm talking about the same situation I cited at the beginning of this message, recording a single acoustic instrument with a single mike on a single channel, but it ends up being stereo because of Sonar's default track type.)
Please forgive me if I seem to be beating a dead horse here, but sometimes I simply don't express myself well and this seems to be one of those times, so I'm trying very hard to make sure I'm saying exactly what I mean.