Re: [Lilypond-auto] Issue 3097 in lilypond: Improve doc for Going Back In MIDI Time error with mis-use of acciaccatura

[lilypond]

Comment #1 on issue 3097 by address@hidden: Improve doc for Going Back  
In MIDI Time error with mis-use of acciaccatura
http://code.google.com/p/lilypond/issues/detail?id=3097

All is needed is just a note before the acciaccatura, because, in order to  
understand the error (and the solution), you need to compare the whole  
duration of the acciaccatura block with the duration of the previous note.  
The preceding note is currently missing in the examples following this  
sentence:

"Each grace note in MIDI output has a length of 1/4 of its actual duration.  
If the combined length of the grace notes is greater than the length of the  
preceding note a “Going back in MIDI time” error will be generated. Either  
make the grace notes shorter in duration, for example:"

Here's the change:

c8 \acciaccatura { c'8[ d' e' f' g'] }
becomes:

c8 \acciaccatura { c'16[ d' e' f' g'] }
Or explicitly change the musical duration:

c8 \acciaccatura { \scaleDurations 1/2 { c'8[ d' e' f' g'] } }