Capo chords

[Tim Packer]

Hi all,

I hope I'm not missing something obvious, but I couldn't see anything on this 
in either the archives or the documentation....

I'm notating music with a melody and guitar chords to be played with a capo on 
the guitar, and I'd like to include two chord names at each point: the actual 
chord and the chord shape played, for example "C (A)" for a piece played with a 
capo on the guitar at the 3rd fret (meaning the shape used is A major, but the 
chord sounded is C major, because the guitar is transposed up 3 semitones by 
the capo).

By using ChordNames and \transpose I can include *either* of these, but I can't 
find a way to include both (putting in a second ChordNames environment leads to 
the software trying to work out a chord that's a combination of the transposed 
and untransposed notes!).  I suppose I could hack it with manual text, but that 
would be icky.

I'm using Lilypond 2.2.6, but I'd be happy to upgrade if there's a solution in 
a later version.

Any suggestions?

If this isn't a currently available feature, I'd suggest it would be a useful 
thing to implement, as capo chords are very common in popular music books.

Thanks for your time,

        Tim
        =-=