[MEI-L] comment on MEI @clef.trans values

[Byrd, Donald A.]

I vote for changing 15va => 15ma; also adding 15mb, which has actually 
been used in published music (if anyone cares, I know of three 
occurrences, one in a well-known piece: Cowell's The Tides of 
Manaunaun).

--Don


On Mon, 10 Aug 2009 13:44:12 -0700, Craig Sapp <craigsapp at gmail.com> wrote:

> Hello MEIers
>
> In DTD 1.9b, I notice that there are
> three choices for @clef.trans which is a
> transposition value for a clef sign:
>
> 8va = transpose up one octave higher than written
> 8vb = transpose down one octave lower than written
> 15va = transpose up two octaves.
>
> 8va is the abbreviation for "ottava" in Italian.
> 8ba is the modern abbreviation for "ottava bassa"
>
> 15va does not exists as an abbreviation in Italian,
> but is rather "15ma" which stands for quindicesima,
> or a perfect 15th (two octaves).
>
> It may be better to change "15va" to "15ma".  And if so,
> then also add "15mb" represending "quindicesima bassa"
> for playing two octaves lower for completeness.
>
> Alternatively, the transposition could be given numerically
> as in +1 for 8va, -1 for 8ba, +2 for 15ma and -2 for 15mb. Or,
> semitones could be used: +12 for 8va, -12 for 8vb, +24 for
> 15ma, and -24 for 15mb.
>
> -=+Craig
>
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--
Donald Byrd
Senior Scientist
Adjunct Associate Professor of Informatics & Music
Indiana University, Bloomington