Too many notes, not enough fingers! How can I keep bass note while playing this arpeggio? ? shows the fret I cannot reach because I use index finger to play bass note. I have tried to barre index finger across frets 7 and 8 but I'm not sure if this is right approach here.
?
E|--10--------
B|--9----9----
G|--10-7----7-
D|------------
A|--8---------
E|------------
You could possibly use an angled barre chord, where you use your index finger on both the 8th fret on A, and the 7th fret on B.
I am aware that this is a weeeeird technique, and I'm not all that familiar with it. I read about it in a book called Chord Chemistry by Ted Greene, and the article here even calls it the Ted Greene chord.
It is quite a tricky technique, and I think each person's individual hand proportions affects how easy they are to do, but I've asked a question to try and get some more info about them: How do you play barre chords which are at an angle?
I don't see any way to finger that chord other than using the index for the bass note, and I don't see any way to play the arpeggio other than using the index finger on G string fret 7, so I don't see how you could keep the bass note ringing.
If you MUSt keep the bass note and don't mind changing the octave of one of the other notes, then you could play the higher D (E string fret 10) instead of that mid D (G string fret 7), or the lower D (open D string). That way you don't even have to move your hand from the original chord position...
I think the easiest (and also the most musical) way would be to leave out the high f (10th fret G string), because it's just the octave of the bass note and does not add any color to the chord. So you simply play the following chord (from low E to high E):
X 8 X 7 9 10
Then everything can ring out during the whole arpeggio (except the original high f, of course, but nobody will miss it.)
