Re: Any thoughts on how to automatically avoid rest collisions in polyphonic music?

[Urs Liska]

Am 26. Oktober 2016 16:56:16 GMT-07:00, schrieb "H. S. Teoh" <address@hidden>:
>On Wed, Oct 26, 2016 at 04:52:18PM -0700, David Bellows wrote:
>> > Do you use the \voiceOne, \voiceTwo, \voiceThree commands in the
>> > generated parts?  Sometimes those can help, by rendering rests for
>> > each voice separately. Not sure if this is the solution you're
>> > looking for, though.
>> 
>> I had been but keeping it all straight and making the process
>> infinitely expandable became a headache so now I use << voice1 //
>> voice2 // voice3 >> etc which is easy to just keep adding to. Would
>> using \voiceOne (etc) make that much of a difference?
>
>You can try it and see?  In my experience, it does help with placement
>of notes especially when you have rests in multiple voices. Lilypond is
>generally quite good at handling shifting notes/rests horizontally to
>make them fit, but that depends on how complex the music is. Some cases
>may be so complex it will always require manual intervention.
>
>I'm not sure about using << ... // ... >> to make it "infinitely
>expandable"... wouldn't the output become illegible past 4 voices?  If
>you're mechanically generating these parts, I'd say keep it to 2 voices
>per staff, which is least problematic. In theory, it should be easy for
>the program to allocate a new Staff for every two voices, right?
>
>You could have more, up to 4 per staff, if you use \voiceOne,
>\voiceTwo,
>...  \voiceFour, but then there would be cases where collisions become
>inevitable and lilypond may just give up trying to figure it out.  At
>least, it would require manual intervention (recently I've been working
>on a complex 4-voice piano score and lots of manual intervention were
>needed to keep things straight and not turn into spaghetti on the
>page).
>


I think you're missing something: the double backslash construct that David 
uses already creates the voices as \voiceOne \voiceTwo etc. implicitly. So if 
that isn't good enough engraving-wise then setting it manually should not make 
any difference.

Urs
>
>T

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