[MEI-L] "Cancelling" key signatures

[Eleanor Selfridge-Field]

Hi, All,

 

I think the convention of signaling or  reiterating cancelled accidentals
varies quite a bit with publisher and period.   We have certainly
encountered them quite a bit.  My non-scientific impression is that that
they steadily increase over time into recent decades.  That is, as
harmonies become more distance, forewarning and redundancy become more
desirable.

 

There are at least two common models: (1) cancel, or introduce,
accidentals just before a light double bar and/or at the end of a system
as a cue to the performer, or (2) simply change them at the start of the
relevant passage, especially if it is coincident with a meter change.  

 

Definitely a challenge to standardization!

 

Eleanor

 

 

Eleanor Selfridge-Field
Consulting Professor, Music (and, by courtesy, Symbolic Systems)
Braun Music Center #129
Stanford University
Stanford, CA 94305-3076, USA
http://web.stanford.edu/~esfield/  +1/ 650 725-9242

 

 

 

 

From: mei-l [mailto:mei-l-bounces at lists.uni-paderborn.de] On Behalf Of
Andrew Hankinson
Sent: Thursday, September 04, 2014 2:26 PM
To: Music Encoding Initiative
Subject: Re: [MEI-L] "Cancelling" key signatures

 

If there's an explicit change in printed key signature it's not really
necessary to cancel the sharps, as far as I know. So you would not write
3n1s, since a change from 3s to 1s is explicit. Even 3s to 3f would be
fine. 

 

It's really only the absence of any key signature (Cmaj/Amin) where an
explicit change with naturals would be needed to clarify that the key
signature has changed.

 

-Andrew

 

On Sep 4, 2014, at 5:21 PM, Laurent Pugin <lxpugin at gmail.com
<mailto:lxpugin at gmail.com> > wrote:





Hi Andrew, 

I would expect this to be done at the rendering. For example, naturals
would be added when changing from 4s to 1s. But maybe I am overlooking
something.

In any case, I am not sure your regexp would do the job since you would
probably need to have both s or f together with n. For example 3n1s for
the aforementioned case. 

Laurent 

On Sep 4, 2014 10:29 PM, "Andrew Hankinson" <andrew.hankinson at gmail.com
<mailto:andrew.hankinson at gmail.com> > wrote:

Hi all,

The data.KEYSIGNATURE regex specifies the following valid values:
"mixed|0|[1-7][f|s]".

However, naturals may also appear in a key signature to clarify cancelling
a key signature; for example, if you were to go from Gmaj to Cmaj, you may
wish to write a natural in the key signature to indicate the new key.

Perhaps the regex should be amended to: "mixed|0|[1-7][f|s|n]"?

Or is there another suggestion?

Cheers,
-Andrew




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