RE: purpose of commands

[Mark Stephen Mrotek]

Trevor:

Thanks for helping me over the learning curve.

Mark

-----Original Message-----
From: Trevor Daniels [mailto:address@hidden 
Sent: Sunday, August 18, 2013 12:48 AM
To: Mark Stephen Mrotek; address@hidden
Subject: Re: purpose of commands

Hi Mark

This snippet is rather contrived and misleading.  I think it should be
removed from the docs, or at least replaced with one which shows when the
definition of voiceFive is really necessary - when explicitly defining
voices.

First, the \voicexxx commands are unnecessary when using the << {}\\{}>>
construct.  They have to be placed here only because the voices are entered
in the incorrect order.  If instead the five voices are entered from voice
one to voice five in order omitting voice four everything works fine without
having to define \voiceFive, as shown below.  The bar "||" has no effect in
the position shown.  It should be at the end of one of the five music
expressions.

Try this:

% voiceFive = #(context-spec-music (make-voice-props-set 4) 'Voice)

\relative c'' {
  \time 3/4
  \key d \minor
  \partial 2
  <<
    {
%      \voiceOne
      a4. a8
      e'4 e4. e8
      f4 d4. c8
      \bar "||"
    }
    \\
    {
%      \voiceTwo
      d,2
      d4 cis2
      d4 bes2
    }
    \\
    {
%      \voiceThree
      f'2
      bes4 a2
      a4 s2
    }
    \\
% no voice four
    \\
    {
%      \voiceFive
      s2
      g4 g2
      f4 f2
    }
  >>
}

or this

voiceFive = #(context-spec-music (make-voice-props-set 4) 'Voice)

\relative c'' {
  \time 3/4
  \key d \minor
  \partial 2
  <<
    \new Voice  {
      \voiceOne
      a4. a8
      e'4 e4. e8
      f4 d4. c8
      \bar "||"
    }
    \new Voice {
      \voiceTwo
      d,2
      d4 cis2
      d4 bes2
    }
    \new Voice {
      \voiceThree
      f'2
      bes4 a2
      a4 s2
    }
    \new Voice {
      \voiceFive
      s2
      g4 g2
      f4 f2
    }
  >>
}

Trevor

----- Original Message ----- 
From: "Mark Stephen Mrotek" <address@hidden>
To: <address@hidden>
Sent: Sunday, August 18, 2013 7:55 AM
Subject: purpose of commands


> Hello:
> 
> 
> 
> The attached snippet, commands.ly, is from
> 
>
http://www.lilypond.org/doc/v2.16/Documentation/notation/multiple-voices.htm
> l.
> 
> 
> 
> 1.       What is the purpose/effect of the first line?
> 
> 2.       What is the purpose/effect of the command \bar "||" before
> voiceTwo?
> 
> 
> 
> Thank you.
> 
> 
> 
> Mark
> 
>


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