I thought that if the idea was to record a single audio track, that track would have some sort of icon or something, like the rest of the items in the mixer. Because, if not, how do you mix the single audio track, with the rest of the mixer tracks, in BIAB? Is it the intention of the programmers that you leave BIAB for RealBand to work on the audio track, and then come back?
The single Audio Track is accessible by clicking on the little button at the very bottom RH corner of the default mixer display.
This will expand the mixer by adding the same sort of Fader and VU for the separate Audio Track that you see normally for the other tracks.
When Recording, it is important to set the Record Properties for your sound device, whether internal or external, to the Input that your quitar is coming in on, likely the Line input. Otherwise the VU movement you see while playing is coming from the sound device's Playback Mixer and what you are thus seeing is the Monitoring of the Input, which is necessary so that you can also hear yourself play while Recording.
Takes a bit of a learning curve, but Band in a Box, unlike most other programs designed for music making, practicing, etc. is very much like learning a musical instrument that is new to you. That may seem complicated at first, but think of it this way, if the program was easily mastered in one or two sessions, it would not be worth having or using. The level of complexity is indeed daunting for just about everyone at first, but most soon overcome. Others, like myself many years ago, let it languish for too long and then when returning to it at a later time, got into it with determination and found that everything that is in this program is there for a reason and is actually necessary for one use or another.
This forum is here to help get through the necessary Learning Curve.
Also -- The Band in a Box "FAQs" page is there as well, bookmark it (a link is at the bottom of every one of my posts here) and read how to use ctrl-f on the page to rapidly find keywords at issue. There are also Tutorial links within the FAQs as well. Very handy and faster than waiting on replies to forum posts sometimes. The FAQs are derived from actual Forum Questions asked over the years.
Tis easier than 4-handed Dentistry...
Have Fun,
--Mac