Re: arpeggio bracket and polyphony

[Gilles]

> I want to connect using arpeggio bracket notes written in polyphony.
> I use it to describe barre chords for guitar.
> For example I have chord < aes' c''  f''>  in first polyphony stave and 
> note f' for second polyphony stave and I want to connect them via
> arpeggio bracket to say that you must apply barre for left hand on first 
> fret.

To have the arpeggio connected in the two staves of a "PianoStaff", I used 
the following property:
  \set PianoStaff.connectArpeggios = ##t

Then, you could just write "\arpeggio" at the corresponding locations:
  < aes' c''  f''>\arpeggio
and
  f'\arpeggio


Gilles