Re: Repeat 8va

[Christopher R. Maden]

On 01/08/2016 04:08 PM, John Gourlay wrote:
> As an exercise in learning to use LilyPond I’m engraving “The
> Entertainer” by Scott Joplin. In the old published version I’m
> working from (1902), the score looks like this at measure 22:
>
> I’m concerned about the “Repeat 8va”, which I assume means that on
> the second repetition of this section it should be played an octave
> higher than the first time. Do you know how to make this happen in
> LilyPond? I can easily make the LilyPond output simply say “Repeat
> 8va”, but I’d really like LilyPond to know about the octave change,
> so the midi output of the second repetition is played in the correct
> octave.

Generally, once you get into any kind of moderately complicated score, 
you have to concoct your score and MIDI separately, e.g.:

theTune = c c c c

theScore = \repeat volta 2 { \theTune }

theMidi = \theTune \transpose c c' \theTune

\score{ \theScore \layout{} }

\score{ \theMidi \midi{} }

I like to use \articulate in the MIDI block, too, for instance.

~Chris
--
Chris Maden, text nerd  <URL: http://crism.maden.org/ >
“If you’ve been a man o’ action, though you’re lying there in traction,
 You will gain some satisfaction thinkin’, ‘Jesus, at least I tried.’”
  — Andy M. Stewart (1952–2015), “Ramblin’ Rover”