\version "2.12.3"

% Accordion register glyph definition, should be constant.
discant = \markup {
\musicglyph #"accordion.discant"
}
dot = \markup {
\musicglyph #"accordion.dot"
}
accTremolo = ^\markup {
\combine
    \discant
    \combine
	\translate #'(-1 . 0) \raise #1.5 \dot
	\translate #'(1 . 0) \raise #1.5 \dot
}
% accViolin = ^\markup {
%   \combine
%     \discant
%     \combine
%       \raise #1.5 \dot
%       \combine
%         \translate #'(1 . 0) \raise #1.5 \dot
%         \raise #2.5 \dot
% }

% Attempt to define bass+chord symbol.
accBassNotehead = \markup { \musicglyph #"noteheads.s2cross" }
accBassChordNotehead = \markup {
    \combine 
	\accBassNotehead
	\translate #'(0.3 . -0.23) \accBassNotehead
}