Hi Joe,
But there is still something wrong with my understanding. When I
compile the attached with 2.22, Lily complains of a barcheck fail at
15,30 :-(
This is caused by \unfoldRepeats in the MIDI version of the score and
the conflicting simultaneous \partials you issue in mill_mill_o (begins
with \partial 8*2) and mill_mill_o_chords (begins with \partial 8).
Ultimately, the reason is your non-standard (or by usual standards
"wrong") notation of a repeat.
a) \partial makes the current bar "shorter than usual". You only have to
issue this once in simultaneous layers of music (for example, only in
the melody, not also in the chords). It's not wrong to issue it in each
simultaneous layer, but to have \partial 8 and \partial 8*2 (which is
\partial 4, by the way) simultaneously makes no sense.
b) In classical notation, your repeat would have to be considered
"wrong" since, at the point where we encounter the :|| sign, we already
are at the end of a complete 4/4 bar. The new pickup bar in effect
creates a 5/4 bar mid-piece, which is not impossible, but very unusual
(and should be written explicitly if really intended).
A standard way of writing repeats in music with pickups (common, for
example, in Bach's chorales) would be:
\version "2.22.0"
\relative c' {
\repeat volta 2 {
\partial 4
c8 d |
e4 e d d |
c2.
} e8 d |
e4 e8 f g4 f8 e
e4( d)^"etc."
}
Note that the last bar inside the \repeat is incomplete (c2.), but
together with the new pickup (c8 d in the repeat, e8 d afterwards) makes
for a complete bar.
Lukas
