Hi,

In Band-in-a-Box, you'd go to Options - Preferences - Audio, and change the "Audio track type for this song" and "Preferred default track type for new songs" to Mono (since we'd rarely need to record in stereo).

In RealBand or PowerTracks, you'd right-click on the track before recording, and change Track Type to Audio - Mono, as Rharv described above.

Thanks
Kent
PG Music