Okay. (Post EDIT, can also advance straight to the bottom ;_
Assuming you have chords to play either because you're doing something original or found chord tabs on the internet (shouldn't be too hard) or managed to hear/trial and error them. (/^o^)/
Well here's problem No.1, it's not like I know how to use the editor, but maybe I can help you a bit with my limited 1year 'o Rocksmith guitar skills. *cough*
(Perfect time to lose my stylus agh, hard to try things myself)
Having a cursory look it seems the Guitar mode is set up to let you play Chords and Arpeggios. Chords being, well Chords (multiple notes ringing out at the same time) and arpeggios = playing individual notes of a chord one after another. (ignore arpeggios for the time being, you probably don't need them only chords to carry the rhythm)
The problem you're having there is probably that you don't know which strings to strum to make a chord ring out correctly I'd guess? It might be too work intensive, but I think looking at a page that shows you how to play the chords could allow you to bypass that.
For example JustinGuitar's chord page.
Basically, I want you to ignore everything you see in the chord boxes except for the top part. That shows you what strings to play which should be what makes your chords sound shitty (the input in　リズム
, the rest would be the fingering which you basically chose by choosing the chord to play (コード input).
I think Bandbros reads like tabs, so string 6 is the first string on the left of the chordbox (low E).
Simply strum all strings except the ones with X. (The X means this chord is
not strummed, the O would be an
open string which doesn't have a finger on it when strummed on a real guitar).
In summary, for D, only strum strings 1-4.
Try that with your chords, put two of the same after each other and strum all the strings on one chords and only the right ones on the other, you should be able to notice the difference. That should fix your chords sounding crummy.
EDIT: Ok shit, whaddaya know. The above is all fine and dandy and I'll leave it there because it's good advice, BUT you don't actually have to look at that when you want to compose. After choosing a chord and going to the rhythm section to choose your strumming, the strings (numbers) that compose your chord have a white background. so
only strum the numbers with the white background (the others have a grey background) and you should be fine!
<- TLR
The chord will ring out until the next X (音を止める
, denoted by the pink boxes.
