Re: A must-see for anybody on this list

[Joseph Rushton Wakeling]

On 02/12/2013 12:48 PM, David Kastrup wrote:
> Looks we are missing the proper command for this.  With \pitchedTrill,
> transposition works.

Yes, absolutely.  A proper command would also help with the appearance -- as it 
stands getting the accidental placed just right over the trill sign is a bit 
finnicky.

Bear in mind it's not just trills but _any_ ornament (prall, mordent, turn, ...) 
where this applies, and some of them the accidental may be above or below (or 
conceivably, one above _and_ one below).

One issue with \pitchedTrill: AFAICS it operates only with a trillSpan.  It's 
not obvious from the docs how to get pitchedTrill notation without an extender line.

> As long as we provide a _proper_ command for that _and_ the user learns
> them and does not put the names/notes/accidentals manually, things
> should work fine.

Yes.  This is something where LP probably has a potential edge over WYSIWYG 
editors, because the ornament's appearance doesn't need to be calculated in 
"real time" as it were.

> You can write a pitch-normalizer for that purpose.  Not sure whether we
> might not already have something like that.

There's a snippet to that extent somewhere in the repository.  At some point in 
the past I tried to rework that into a general framework for setting the rules 
of transposition, but I couldn't get it to a satisfactory conclusion :-(

I can probably prepare a spec for what I'd like to see in terms of transposition 
rules, if that would be helpful.  The short version: you need to have a variety 
of rule sets (at least 2: chromatic and tonal), you need to be able to switch 
arbitrarily between the two (e.g. some music may have tonal parts and atonal parts).