Re: programming error: Going back in MIDI time

[Janek Warchoł]

Hi,

2011/4/5 Peter O'Doherty <address@hidden>
>
> Hi,
> I know this has been asked before but I haven't been able to resolve it 
> satisfactorily.
> Can anyone suggest a solution to this error?
> It occurs in the example below, i.e. when the grace note has more than 4 
> members.

The number 4 is not important here - what matters is the fact that
grace notes take more time than the previous note.
using
  \acciaccatura { c'16[ d' e' f' g'] }
or
  \acciaccatura { \scaleDurations #' (1 . 2) { c'8[ d' e' f' g'] } }
%make notes 2 times shorter than they look
fixes this problem, is it satisfactory for you?

HTH,
Janek

> ##################
> \version "2.12.3"
> \include "english.ly"
>
> upper = {
>  \clef treble
>  \time 4/4
>  %a'8[ a' a' a'] \acciaccatura { c'8[ d' e' f' g'] } a'8[ a'8 a'8 a'8 ] 
> %doesn't work
>  a'8[ a' a' a'] \appoggiatura { c'8[ d' e' f'] } a'8[ a'8 a'8 a'8 ] %works
> }
>
> lower = {
>  \clef bass
>  f4 f f f
> }
>
> \score {
>  \new PianoStaff
> <<
>    \set PianoStaff.instrumentName = #"Piano"
>    \new Staff = "upper" { \upper
>     }
>    \new Staff = "lower" {\lower
>    }
> >>
>   \layout {
>     \context {
>          }
>   }
>   \midi { }
> }
> ##################