Re: [Lilypond-auto] Issue 687 in lilypond: Enhancement: inequal MIDI quantization of equal durations (swing, rubato)

[lilypond]

Comment #49 on issue 687 by address@hidden: Enhancement: inequal  
MIDI quantization of equal durations (swing, rubato)
http://code.google.com/p/lilypond/issues/detail?id=687

O.k, I won't get around to it this weekend, sorry. If someone else wants to  
get this started, please go ahead.

Below I'll dump some draft entries for the Music Glossary, which could go  
into the patch (but might need improvement first):

---- [untested tely code] ----
@node triplet feel
@section triplet feel

ES: ?,
I: ?,
F: ?,
D: ternäre Rhythmik,
NL: ?,
DK: ?,
S: ?,
FI: ?.

A specific type of @ref{swing feel}.

Two consecutive notes of a specific equal written duration, typically
eighths, are interpreted unequally, with the first note held twice as
long as the second. Thus, in triplet feel the top staff below is
played identically to the bottom staff:

@lilypond[quote]
\layout { \context { \RhythmicStaff \override TimeSignature #'stencil = ##f  
} }
<<
  \new RhythmicStaff { g8*4/3 g8*2/3 g8*4/3 g8*2/3 }
  \new RhythmicStaff { \times 2/3 { g4 g8 } \times 2/3 { g4 g8 } }

@end lilypond

Triplet feel interpretation may be prescribed at the beginning of a
piece, or be assumed implicitly as part of a musical style.

@seealso
@ref{notes inégales}


@node notes inégales
@section notes inégales

ES: ?,
I: ?,
F: notes inégales,
D: notes inégales,
NL: ?,
DK: ?,
S: ?,
FI: ?.

(French for \emph{unequal notes}.)

A manner of performance associated with, in particular, French music
from the 16th to 18th century.

Certain sequences of notes written with equal duration, usually
eighths or sixteenths, are interpreted with a dotted rhythm,
address@hidden@tie{}in a pattern of alternating prolongued and shortened
notes.

The amount of lengthening and shortening may vary according to the
character of the piece. The example below shows several possible
@emph{inégal} interpretations for the straight eighths from the first
measure:

@lilypond[quote]
<<
  \new RhythmicStaff \with { \override TimeSignature #'stencil = ##f }
  {
    \time 2/4
    g8 g g g |
    \times 4/5 { g8. g8 } \times 4/5 { g8. g8 } |
    \times 2/3 { g4 g8 } \times 2/3 { g4 g8 } |
    g8. g16 g8. g16
  }

@end lilypond

@seealso
@ref{swing feel}


@node swung notes
@section swung notes
@xref{swing feel}

@node shuffled notes
@section shuffled notes
@seealso
@xref{swing feel}


@node swing feel
@section swing feel

ES: ?,
I: ?,
F: ?,
D: Swing, Shuffle-Rhythmus,
NL: ?,
DK: ?,
S: ?,
FI: ?.

A notational practice, mainly in jazz-influenced music, where certain
sequences of notes written with equal duration are implied to describe
a dotted rhythm, address@hidden@tie{}a pattern of alternating prolongued
and shortened notes. These are called @emph{shuffled} or @{swung
notes}. Most typically, eighths or sixteenths notes are swung.

The amount of lengthening and shortening may vary according to musical
style and the character of the piece. @xref{triplet feel} for a
specific example.

Application of a swing feel may be prescribed at the beginning of a
piece, or be assumed implicitly as part of a musical style. Swung
eighths are so ubiquitous in some genres that it is common to indicate
the reverse case explicitly as @emph{straight eighths}.

@seealso
@ref{notes inégales}.
--------