Re: Multiple repeat nested with alternative

[Valentin Villenave]

Greetings,

since I'm trying to catch up with this list's unresolved issues, I
have opened a tracker page to keep track of this discussion about
nested repeats. Although I can hardly make heads or tails out of this,
I hope I have managed to roughly explain what it is about:
http://code.google.com/p/lilypond/issues/detail?id=791

Regards,
Valentin


2009/3/17 Mats Bengtsson <address@hidden>:
> I think some clarifications might be needed:
>
> - LilyPond typesets the final alternative without a terminating vertical
> bar, except when the end of the alternative coincides with any of the
> following types of bar lines: ":|", "|:", "|.", ":|:", ":|.|:", ":|.:",
> ".|".
>  Can any of you who have proposed a new \finalalternative please provide a
> simple example showing when such a feature would be needed, just as
> Valentine requested.
>
> - One way to obtain the desired layout using current Lilypond features, has
> already been proposed.
>  An alternative solution is
> \relative c'{
> \repeat volta 2 { a a a a | b b b b | }
>   \alternative{{c c c c | }{\bar ":|:" d d d d | }}
> \repeat volta 2 {
>   % Trick needed to fool LilyPond to not typeset the "|:" bar line:
>   \once \set Timing.defaultBarType = "" \bar "|"
>   e e e e | } \alternative {{f f f f }{g g g g }}
> }
> Unfortunately, this hack will not work nicely together with \unfoldRepeats
> or MIDI output, for obvious reasons.
>
>     /Mats
>
> Hans Aberg wrote:
>>
>> On 12 Mar 2009, at 09:49, Werner LEMBERG wrote:
>>
>>>>>                     ________     ________            ________
>>>>>  ________
>>>>>                    [1.      ]   [2.                 [1.      ]  [2.
>>>>> | x x x x | x x x x | x x x x :||: x x x x | x x x x | x x x x :|| x x
>>>>> x
>>>>> | x |
>>>>>    A         B         C            D         E         F           G
>>>>>
>>>>> The correct order of performance/reading should be:
>>>>> A B C A B D E F D E G
>>>>
>>>> Honestly, I would just scrap the repeats alltogether and write it
>>>> all out.  As a person reading this, I would be very confused by what
>>>> was meant.
>>>
>>> I strongly disagree.  This is standard notation since centuries; many
>>> works by Mozart, Beethoven et al. use exactly this.
>>
>> Hindemith, "Elementary training...", p. 70, uses it. So it seems to be
>> standard. Note the subtlety that the last alternative is without a
>> terminating vertical bar, indicating a continuation.
>>
>> It might suffice to support a syntax like
>>  \repeat volta 2 {A B}
>>  \alternative {C}
>>  \repeat volta 2 {D E}
>>    \alternative {F}
>>  G H I J ...
>> That is, simply indicating one alternative less than in the "volta".
>> LilyPond could then infer that there should be another alternative mark
>> added in the following measure.
>>
>> Strictly speaking, this additional last alternative mark is redundant from
>> the semantic point of view: drop it and the music should be played the same.
>> (Though it may have to be there for traditional reasons.)
>>
>>  Hans
>>
>>
>>
>>
>> _______________________________________________
>> bug-lilypond mailing list
>> address@hidden
>> http://lists.gnu.org/mailman/listinfo/bug-lilypond
>
> --
> =============================================
>        Mats Bengtsson
>        Signal Processing
>        School of Electrical Engineering
>        Royal Institute of Technology (KTH)
>        SE-100 44  STOCKHOLM
>        Sweden
>        Phone: (+46) 8 790 8463
>       Fax:   (+46) 8 790 7260
>        Email: address@hidden
>        WWW: http://www.s3.kth.se/~mabe
> =============================================
>
>
>
> _______________________________________________
> bug-lilypond mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/bug-lilypond