Bad Lilypond preview (though Rosegarden preview is ok)

[Emmanuel Saracco]

Hi all,

I have some trouble with stylesheet printing.

I attached 2 examples. The Rosegarden preview is ok while the Lilypond
preview is not.

The problem seems to come from 2/4 signature with a quarter at first and
fifth position. If I reduce them to a sixteenth, then Lilypond rendering
is ok.

Any idea?

Thanks,

Bye



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[D. Michael McIntyre-3]

On Saturday 13 September 2008, Emmanuel Saracco wrote:

> I attached 2 examples. The Rosegarden preview is ok while the Lilypond
> preview is not.

Weird.  The Rosegarden preview you say is OK doesn't make musical sense to me.  
You're in 2/4 and let's just look at your first bar.  You have (as depicted
in your attachment):

1/4 1/16 1/16 1/16 1/4 1/16 1/16 1/16

It looks like Rosegarden is doing something wrong if it displays all of that
in one bar of 2/4.

In one bar of 2/4, you could have

1/4 1/16 1/16 1/16 1/16

or

1/4 1/4

or

1/4 1/8 1/8

or

1/4 triplet[1/8 1/8 1/8]

or

1/4 triplet[1/16 1/16 1/16] triplet[1/16 1/16 1/16]

but there's no way to have

1/4 1/16 1/16 1/16 1/4 1/16 1/16 1/16 in a single bar without triplets.  The
two 1/4 notes fill up the entire bar by themselves.

Something is weird.  Maybe it would be more clear to me if you would be so
kind as to email me the file you're working on, so I can play with it
first-hand and see what's up in context.

--
D. Michael McIntyre

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[Emmanuel Saracco]

Hi,

.rg sent to you off-list.

Thanks,

Bye

D. Michael McIntyre a écrit :

> On Saturday 13 September 2008, Emmanuel Saracco wrote:
>
>> I attached 2 examples. The Rosegarden preview is ok while the Lilypond
>> preview is not.
>
> Weird.  The Rosegarden preview you say is OK doesn't make musical sense to me.  
> You're in 2/4 and let's just look at your first bar.  You have (as depicted
> in your attachment):
>
> 1/4 1/16 1/16 1/16 1/4 1/16 1/16 1/16
>
> It looks like Rosegarden is doing something wrong if it displays all of that
> in one bar of 2/4.
>
> In one bar of 2/4, you could have
>
> 1/4 1/16 1/16 1/16 1/16
>
> or
>
> 1/4 1/4
>
> or
>
> 1/4 1/8 1/8
>
> or
>
> 1/4 triplet[1/8 1/8 1/8]
>
> or
>
> 1/4 triplet[1/16 1/16 1/16] triplet[1/16 1/16 1/16]
>
> but there's no way to have
>
> 1/4 1/16 1/16 1/16 1/4 1/16 1/16 1/16 in a single bar without triplets.  The
> two 1/4 notes fill up the entire bar by themselves.
>
> Something is weird.  Maybe it would be more clear to me if you would be so
> kind as to email me the file you're working on, so I can play with it
> first-hand and see what's up in context.

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[D. Michael McIntyre-3]

On Sunday 14 September 2008, you wrote:

> Nothing weird here :-) First and fifth notes are bass notes, and their
> sound must remain until other sixteenths are played.

Rosegarden sees it the same way I just did, because you have all of those
notes in the same segment.  What you need to do is split into two overlapping
segments, put the bass notes into one of them, and the 16ths in the other,
like

A) 1/16R 1/16 1/16 1/16  1/16R 1/16 1/16 1/16
B) 1/4                   1/4

Then it will come out fine.

See http://rosegarden.sourceforge.net/tutorial/supplemental/piano/index.html 
for lots of detail on this issue.

Actually, trying to fix your example leads to one interesting problem.  I
selected the bass notes in the one segment I'm cleaning up and cut them. Then
I went out to the segment canvas and used paste to create a new segment.  
This (pasting notes cut out of the notation editor onto the segment canvas
directly) is the only remaining way to create a segment without a clef.  
(Bug, or at least inconsistent behavior #1.)

Since there's no clef, it's a default, unwritten treble, and that doesn't
match the guitar clef you used in the other segment.  I can't find a way to
enter a guitar clef by hand, and while I probably did it that way on purpose
in the code, it definitely feels wrong now (issue #2).

You can go to Edit -> Convert notation for...  (Convertir la partition
vers...) and pick a guitar and have the change applied that way, so it's not
impossible to get there.  It's just not very intuitive.

Notes taken for after the Qt4 port.

Anyway, once all of that is done, you have two overlapping segments on the
same track, and if you don't want the 16th notes visible, you have to go hide
them (right click, Make Invisible) to get it to come out like you want.

Then it does.  It looks good to me except Rosegarden is drawing the two time
signatures in different places, so it looks like 22/44.  That's an old,
font-related bug, I think.  Just ignore it, please.  We're hoping this will
go away by itself with the Qt4 port.
--
D. Michael McIntyre



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[Gunhild Andersen]

> but there's no way to have
>
> 1/4 1/16 1/16 1/16 1/4 1/16 1/16 1/16 in a single bar without triplets.  The
> two 1/4 notes fill up the entire bar by themselves.


Yeah, but not if there are supposed to be two voices, which it looks
like to me. It looks like the bottom voice wants to have two 1/4 notes
and the top voice should have a {1/16 break followed by 3 1/16 notes} x
2.

Or, in lilypond terms, I'm guessing the top voice should read something
like r16 n16 n16 n16 etc

If I'm right about my assumption that there really are two voices here,
then maybe flipping the stems of the 1/4 notes will help.

/Gunhild




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[Emmanuel Saracco]

D. Michael McIntyre a écrit :

> On Sunday 14 September 2008, you wrote:
>
>> Nothing weird here :-) First and fifth notes are bass notes, and their
>> sound must remain until other sixteenths are played.
>
> Rosegarden sees it the same way I just did, because you have all of those
> notes in the same segment.  What you need to do is split into two overlapping
> segments, put the bass notes into one of them, and the 16ths in the other,
> like
>
> A) 1/16R 1/16 1/16 1/16  1/16R 1/16 1/16 1/16
> B) 1/4                   1/4
>
> Then it will come out fine.
>
> See http://rosegarden.sourceforge.net/tutorial/supplemental/piano/index.html 
> for lots of detail on this issue.

Ok, great! Thanks for your time and for the tip. I will rewrite it this
way :-)

Bye

> Actually, trying to fix your example leads to one interesting problem.  I
> selected the bass notes in the one segment I'm cleaning up and cut them. Then
> I went out to the segment canvas and used paste to create a new segment.  
> This (pasting notes cut out of the notation editor onto the segment canvas
> directly) is the only remaining way to create a segment without a clef.  
> (Bug, or at least inconsistent behavior #1.)
>
> Since there's no clef, it's a default, unwritten treble, and that doesn't
> match the guitar clef you used in the other segment.  I can't find a way to
> enter a guitar clef by hand, and while I probably did it that way on purpose
> in the code, it definitely feels wrong now (issue #2).
>
> You can go to Edit -> Convert notation for...  (Convertir la partition
> vers...) and pick a guitar and have the change applied that way, so it's not
> impossible to get there.  It's just not very intuitive.
>
> Notes taken for after the Qt4 port.
>
> Anyway, once all of that is done, you have two overlapping segments on the
> same track, and if you don't want the 16th notes visible, you have to go hide
> them (right click, Make Invisible) to get it to come out like you want.
>
> Then it does.  It looks good to me except Rosegarden is drawing the two time
> signatures in different places, so it looks like 22/44.  That's an old,
> font-related bug, I think.  Just ignore it, please.  We're hoping this will
> go away by itself with the Qt4 port.

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