Re: Issue 1620 in lilypond: Midi overflow with instrument changes

[lilypond]

Comment #12 on issue 1620 by address@hidden: Midi overflow with  
instrument changes
http://code.google.com/p/lilypond/issues/detail?id=1620

I have a feeling this patch causes a Midi-regression I recently encountered  
after upgrade to 2.13.61.

In 2.13.51 I could perfectly attach "voice oohs" and "choirs aahs" to my  
choir sheets. When processing the same .ly files with 2.13.61 the songs  
suddenly reverted to piano-instrument (which happens to be the first  
midi-instrument used (in an all voices piano setting, after which I have a  
set seperated per voice (Soprano, Alto, Tenor, Bass) with voice oohs for  
the 'lead' voice and choir aahs for the other voices.

Attached is a sample of such a setting for a very simple piece with  
the 'Soprano' voice worked out.
With 2.13.51 this generates (as expected) a midi-file with
'Voice Oohs' rest 'Choir Aahs(reduced volume)' rest 'Choir Aahs(reduced  
volume)' rest 'Choir Aahs(reduced volume)'

With 2.13.61 it turns into
'Piano' rest 'Voice Oohs(reduced volume)' rest 'Voice Oohs(reduced volume)'  
rest 'Voice Oohs(reduced volume)'


Attachments:
        bugsample.ly  1.8 KB