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Re: Semantically equivalent scores look different

From: Erik Sandberg
Subject: Re: Semantically equivalent scores look different
Date: Mon, 14 Oct 2002 23:29:51 +0200

I was a bit unclear, I compiled both the old and the new notes with the same 
lilypond version, 1.6.4. The differences were very small, but sometimes a 
line break was moved one bar.

On Monday 14 October 2002 18.12, Erik Sandberg wrote:
> Hi,
> I have a bunch of works I did before 1.4.12, when the polyphonic music had
> to be done manually, without <x \\ y>. Recently I have ported a few works
> that used the old syntax, to use the modern < \\ > syntax instead. Though
> the music should be exactly equivalent, it happens that the spacing is
> different between the versions (and it happens that the difference is
> significant, e.g. one version can occupy more space than the other).
> The difference between the notes can be something like this (though it only
> happens in more complex examples):
> Old notes:
> \context Staff <{\context Voice = A a \stemUp b \stemBoth d \stemUp e
> \stemBoth g} {\context Voice = B \stemDown s c s f s}>
> New notes :
> \context Staff {a <b \\ c> d <e \\ f> g}
> Is this a behaviour you might consider a bug? (lilypond solves an
> optimization problem, and if pieces that should be considered equivalent
> end up in different solutions, then something might be bad). If you are
> interested, I could try to find a Real Example, but I won't if you don't
> need it (unnecessary work is not good).
> Erik
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