If I am right, you want to take what you play on guitar and turn it into notation that your BW can read, while you are riding on the commuter train--Given the fact that you neither read nor write musical notation right now, that's a steep learning curve project, no matter where you try to do it. Doing it all on the commuter train really seems like "a bridge too far", if you'll excuse the pun.

I have a synth guitar that have used to do what you want to do-I just pop the MIDI cable into the computer, turn on my notation program, and play-I wish I could say it's as easy as pie, but here is what has to happen to get it to work--

1)I have to work up the passage, part or piece that I want to notate(anything from ten minutes to several days) so that I can play it perfectly-

2)I have to play it into the computer (often five or six times, not including false starts)

3)I have to clean up the errors in the performance.

4)I have to convert the audio file to a notational file in whatever program I'm using.

5)I have to regularize the performance--this means taking, say, a string of what I've played as a string of eighth note/eighth rests and turn them into quarter notes, or whatever.(this is probably takes the most time)

5)I have to impose all the notational conventions(starting with.transposing, remember that guitar is written an octave above the actual pitch)

6) I make it nice an print it

7)I reflect on the fact that it took longer than I thought


All of this goes to the point that those of us who can and do play by ear have got one up on the "classically trained" folks who can't or don't, because, even with technology, it is a PITA to notate and score music--