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abc:standard:v2.1:proposals:transposition:v4 [2012/01/24 09:37]
cwalshaw
abc:standard:v2.1:proposals:transposition:v4 [2012/01/24 10:27]
cwalshaw
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 == Enharmonic indicators for transposing instruments == == Enharmonic indicators for transposing instruments ==
  
-Enharmonic distinctions can be determined using the ''​shift'' ​variant ​and the [[#semitone shift table]].+Enharmonic distinctions can be assessed with the ''​shift'' ​modifiers ​and the [[#semitone shift table]] ​even if they have to be inferred.
  
-// Example: // The following ​two fields are identical ​and therefore the resulting score would be typeset as if the key signature were ''​K:​F#''​ rather than ''​K:​Gb''​.+// Example: // In the following, the ''​instrument=Bb''​ and ''​abc=sounding-pitch''​ modifiers imply ''​shift-score=+2'' ​and therefore the resulting score would be typeset as if the key signature were ''​K:​F#''​ rather than ''​K:​Gb''​. See [[#​enharmonic indicators]] for details.
   K:E instrument=Bb abc=sounding-pitch   K:E instrument=Bb abc=sounding-pitch
   K:E shift-score=+2   K:E shift-score=+2
   ​   ​
-To access other enharmonic choices, the ''​shift-score''​ (or ''​shift-sound''​) modifier should be used directly, although it can be used alongside the ''​instrument''​ and ''​pitch''​ modifiers (which are effectively ignored).+To access other enharmonic choices, the ''​shift-score''​ (or ''​shift-sound''​) modifier should be used directly.
  
-// Example: // In the following, the ''​shift-score=+2b''​ indicates that the resulting score should be typeset as if the key signature were ''​K:​Gb''​ rather than ''​K:​F#''​ (although this would be an unusual way to write for a Bb instrument):+// Example: // In the following, the ''​shift-score=+2b''​ indicates that the resulting score should be typeset as if the key signature were ''​K:​Gb''​ rather than ''​K:​F#''​ (although this would be a very unusual way to write for a Bb instrument). See [[#​enharmonic indicators]] for details.
   K:E instrument=Bb abc=sounding-pitch shift-score=+2b   K:E instrument=Bb abc=sounding-pitch shift-score=+2b
   ​   ​
 == Transposition for transposing instruments == == Transposition for transposing instruments ==
  
-If the ''​I:​transpose''​ directive is used for a tune which has one or more voices written for transposing instruments,​ then the transposition is combined with the transposing instrument by adding ​together ​the equivalent ''​shift-score''​ and ''​shift-sound''​ modifiers.+If the ''​I:​transpose''​ directive is used for a tune which has one or more voices written for transposing instruments,​ then the transposition is combined with the transposing instrument by adding the equivalent ''​shift-score''​ and ''​shift-sound''​ modifiers ​into the existing ''​shift''​ modifiers used to specify transposing instrument (even if they have to be inferred).
  
 // Example: // Consider the following excerpt: // Example: // Consider the following excerpt:
Line 184: Line 184:
   K:C   K:C
   CDEF|   CDEF|
-The ''​I:​transposition 7''​ directive is equivalent to applying ''​shift-score=7''​ and ''​shift-sound=7''​ to every key signature. Meanwhile the ''​instrument=Bb abc=sounding-pitch''​ implies ''​shift-sound=2''​. The excerpt above is therefore equivalent to the following ​(since ​the ''​instrument''​ and ''​abc''​ modifiers no longer make sense)+The ''​I:​transposition 7''​ directive is equivalent to applying ''​shift-score=7''​ and ''​shift-sound=7''​ to every key signature ​(see [[#​transposition of a tune file|transposition of a tune / file]]. Meanwhile the ''​instrument=Bb abc=sounding-pitch''​ implies ''​shift-sound=2''​. The excerpt above is therefore equivalent to the following, where the two ''​shift-score''​ modifiers are added together to give 9 and the ''​instrument''​ and ''​abc''​ modifiers ​are omitted since they no longer make sense: 
-  V:clarinet shift-score=9 shift-sound=2+  V:clarinet shift-score=9 shift-sound=7
   K:C   K:C
   CDEF|   CDEF|
abc/standard/v2.1/proposals/transposition/v4.txt · Last modified: 2012/01/27 18:14 by cwalshaw
 
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