I can't speak to the Lilypond notation, but only to the actual score notation. When is this piece of music from? Different composers used various trill markings to mean different things, but the 16th notes, although they are notated normally, are probably part of the ornament. There isnt really a set "duration" for a trill, so no guarantee just "tr" would be an exact quarter note - there can be as much variation in how someone performs a trill as any other musical indication. (ie start the attack slow, almost a full 8th note duration, and speed up through to slow back down for the termination, or a quick sharp attack going rapidly through to the termination, or a gentle ornament that ends on the main note and waits to terminate). To me at first glance, the plain "tr" indicates to trill for the full value not because of itself, but because of that little termination afterwards. The wavy line after it just makes it extra clear what you are supposed to do. These would all be impacted by tempo, composer, country, etc... performance practice of ornamentation is just as ridiculously fussy and messy as anything else in music!
On Thu, Jan 27, 2022 at 7:16 PM Kenneth Wolcott <kennethwolc...@gmail.com> wrote: > So, it appears that \stopTrillSpan being placed on the following note > does not include the following note in the trill; I guess that was > not obvious to me. > > The third question is that the trill does not appear in the midi > output, but articulation.ly would implement it? > > Thanks again, > Ken Wolcott > > On Thu, Jan 27, 2022 at 4:03 PM Kenneth Wolcott > <kennethwolc...@gmail.com> wrote: > > > > Hi; > > > > I have trouble understanding how to implement the \startTrillSpan > > and \stopTrillSpan. > > > > I have two screenshots. > > > > The first is an obvious \trill, no span needed. > > > > The second requires the span, but I don't know how to place the > > \stopTrillSpan. > > > > I see the trill section in the Notation Reference. It does not help > > me understand how to place the \stopTrillSPan correctly. I could > > place the \stopTrillSpan after the following note, but that certainly > > would be correct, right? > > > > Another related question: what is the difference in the actual > > performance of the two types? > > > > This is partially explained by Wikipedia: > > > > "A rapid alternation between the specified note and the next higher > > note (determined by key signature) within its duration, also called a > > "shake". When followed by a wavy horizontal line, this symbol > > indicates an extended, or running, trill. In music up to the time of > > Haydn or Mozart the trill begins on the upper auxiliary note" > > > > So does this mean that a dotted-quarter note trill will only be > > "trilled" for a quarter note duration and will the spanner indicate > > the full dotted quarter duration? > > > > Thanks, > > Ken Wolcott > >
