Stefan,

For this particular snippet I would normally expect to see simply; +? with no dash or dashed line between the + and ?. For such a sort note this would be perfectly clear. For a longer note that gradually opens/closes such a dashed line would be fine, but I would also probably expect to see it done using at least two notes tied together; one note with + and the other with ? with the dashed line between. In the case of repeated open/close across several notes a dashed line would also be clear. For single notes, however, it would normally be sufficient to use simply +? or ?+ as the "wah" effect is usually spread out across the duration of the note.

-David

On 3/1/2010 8:44 AM, Stefan Thomas wrote:
Dear community,
I made a second attempt to create a symbol for the so called wah-wah-effect.
My first question:
Would You think, this is the common way to notate it?
My second question:
I would like to make the textspanner longer, but this, unfortunately, doesn't work.
Here is my snippet:

%%%%%%%%%%%%%% BEGIN %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\version "2.12.2"

wah = {
\override Voice.TextSpanner #'shorten-pair = #'(0 . -8) %this doesn't do anything, why?
  \override Voice.TextSpanner #'style = #'dashed-line
\override Voice.TextSpanner #'(bound-details left text) = \markup { \musicglyph #"scripts.stopped" } \override Voice.TextSpanner #'(bound-details right text) = \markup { \musicglyph #"scripts.open" }
            } %
            harmonmute = ^\markup { \whiteout "harmon mute" }
music = {
   \time 2/4  \wah
\clef "treble" f''16 \harmonmute ( -> \mf [ es''16 ) r16 b'16 -. ] r16 des''16 -. [ r16 as'16 ( ~ -> ] as'16 [ ges'16 ) -. \context Voice << {c''16 -> -. \sfz ]} {s16 \startTextSpan }>> r16\stopTextSpan r4
}
\new Staff \music
%%%%%%%%% END %%%%%%%%%%%%%%%%

2009/12/27 bobr...@centrum.is <mailto:bobr...@centrum.is> <bobr...@centrum.is <mailto:bobr...@centrum.is>>

    Ah, you want a dashed hairpin.  Is this to notate a gradual
    opening/closing?  I would not normally expect to see a dashed
    hairpin but rather simply a dashed line between the '+' and 'o'.
     This means gradual open/close.  It seems that you want something
    like 'o > +' or '+ < o', correct?  I suppose you could mark one
    note with '+' and another with 'o' and place your hairpin between.
     Again, however, as a trombonist I would find this notation
    non-standard and potentially confusing.  I don't know enough about
    your notation requirements to understand why you would want or
    need to notate it this way.

    -David


    ----- Original Message -----
    From: "Stefan Thomas" <kontrapunktste...@googlemail.com
    <mailto:kontrapunktste...@googlemail.com>>
    To: bobr...@centrum.is <mailto:bobr...@centrum.is>
    Cc: "lilypond-user" <lilypond-user@gnu.org
    <mailto:lilypond-user@gnu.org>>
    Sent: Sunday, December 27, 2009 12:13:19 PM GMT -05:00 US/Canada
    Eastern
    Subject: Re: wah-wah-effect

    Dear David,
    thanks for Your help.
    I found out, that I can get a dashed hairpin with \once \override
    Hairpin #'style = #'dashed-line
    What I would like to do is getting a + and an "o" at the beginning
    and the end of the hairpin.
    The "o" is easy to get with
    \override Hairpin #'circled-tip = ##t

    But how I can do it with the "+"-sign?
    2009/12/27 bobr...@centrum.is <mailto:bobr...@centrum.is> <
    bobr...@centrum.is <mailto:bobr...@centrum.is> >



    I'm not sure exactly how you want your wah-wah effect to appear,
    but for starters you can go here:

    
http://lilypond.org/doc/v2.13/Documentation/notation/the-feta-font#index-Feta-font

    ...to find the glyphs you need. The ones you need are listed under
    "Script glyphs." One is "stopped" (looks like '+') and the other
    is "flageolet" (looks like a small circle). There is also "open"
    which looks like a small letter 'o'. I've normally seen the little
    circle (I'm a trombonist). I don't know how to do this without
    experimenting with it but if you want '+O' I suppose you could
    create a script called 'wah' or something and combine them
    together side-by-side. This would mean 'wah' on a single note. If
    you wanted the effect to span two or more notes I think you should
    be able to put the '+' over one note, the 'o' over the other and
    put some sort of dotted/dashed spanner between them.

    Sorry I can't be more specific at the moment but I hope this is
    helpful,

    David


    ----- Original Message -----
    From: "Stefan Thomas" < kontrapunktste...@googlemail.com
    <mailto:kontrapunktste...@googlemail.com> >
    To: "lilypond-user" < lilypond-user@gnu.org
    <mailto:lilypond-user@gnu.org> >
    Sent: Sunday, December 27, 2009 5:51:19 AM GMT -05:00 US/Canada
    Eastern
    Subject: Re: wah-wah-effect





    Dear community,
    I've created a little image (with another program) to illustrate
    what I'm thinking of.


    2009/12/27 Stefan Thomas < kontrapunktste...@googlemail.com
    <mailto:kontrapunktste...@googlemail.com> >


    Dear lilypond-users,
    does someone of You know, how to produce a proper notation for
    wah-wah effect for trumpet or trombone?





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