new feature: accordion registers update

[Davide Bonetti]

Hello to everyone.

I have updated the accordion registers that are in accreg.scm.

I modified accreg.scm and renamed in "accregtwo.scm". This file must be 
placed in lilypond usr/share/lilypond/current/scm directory in order to 
make it work.

also, at the top of a input file is necessary to put:

#(use-modules (scm accregtwo))

Here attached also accreg.ly and accreg.pdf that demonstates the new 
registers.

List of changes

- \discant
    - added common names for registers, such as "bassoon", "musette", 
"organ", etc.
    - added new positions available for accordions with double bassoon 
or double piccolo, every combination is now possible

- \stdBass
    - added a method to choose every combination possible, based on the 
first letter of the reed banks: S A C T B

- \stdBassIV
    - added a method to choose every combination possible, based on the 
first letter of the reed banks: S A T B

- the feta font did not contain any square symbol for standard bass 
accordion registers, so I create this symbol with a markup command, 
named \accordionStdBassSq.
    The new symbol have the same dimensions of \stdBass round symbol, 
and is scalable (it responds at fontsize modifications in the same way 
of a glyph).
    Maybe is possible to create a new glyph for the feta font, but I'm 
not able to do it.
    In accregtwo.scm the code of accreg.scm is modified so it can 
accept the new markup command.

- \stdBassSq
    - new markup command, same of stdBass with square symbol, as 
commonly used in accordion notation.
    based on \accordionStdBassSq

- \stdBassIVSq
    - new markup command, same of stdBassIV with square symbol, as 
commonly used in accordion notation.
    based on \accordionStdBassSq

- \freeBassIII
    - new markup command for accordions with free bass in III, using 
the feta font accordion.bayanbass

- updated the documentation included in the file.

Everything seems to work well.

Testers are welcome!

Question: is there a way to make it work without putting the new file in 
lilypond /scm directory?

Question 2: it is possible that this will become part of an official 
release?

Thaks to all and best regards

Davide Bonetti



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accregtwo.scm
Description: Text Data

accreg.pdf
Description: Adobe PDF document

accreg.ly
Description: Text Data