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Re: how to add barre indications to automatic fret diagrams?


From: Carl Sorensen
Subject: Re: how to add barre indications to automatic fret diagrams?
Date: Thu, 21 May 2015 01:30:07 +0000
User-agent: Microsoft-MacOutlook/14.4.8.150116


On 5/19/15 12:45 PM, "pls" <address@hidden> wrote:

>Hi all,
>
>LilyPond¹s automatic fret diagrams really are a very helpful feature!
>More often than not it helps to not having to predefine and store a
>diagram in a lookup table.  But it has one little drawback: it doesn¹t
>automatically include a barre indication when several strings are to be
>covered by one finger.  The default diagram actually looks a bit as if
>six fingers were needed to play this chord (see example).
>
>\version "2.19.15"
>{
>  \new FretBoards {
>    <f,-1 c-3 f-4 a-2 c'-1 f'-1>
>  }
>}
>
>I have had a look at the \override options of the FretBoard and many
>details are customizable but of course it¹s not possible to override a
>barre indication that isn¹t there.  Now, is there a known way to
>(manually) add barre indications to automatic fret diagrams or do I have
>to use predefined fret diagrams for barre chords in general?

Actually, this should be a feature request for automatic fret diagrams.
Any time two strings have the same finger, they could be part of a barre.
And it would be relatively straightforward to keep a list of minimum and
maximum strings for each finger, and add the necessary barre indications.

LilyPond should be smart enough to do this on its own (speaking as the
original author of the fret diagram code.

Thanks,

Carl




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