Re: Macros for typesetting chords and polyphony

[Bertalan Fodor]

For simpler cases I'd (also) use jEdit's Abbreviation capabilities 
(instead). (Perhaps along with SuperAbbrevs plugin.)
However, you examples with abbreviations are as the following.
The second is trivial with jEdit's abbreviations. You just set a new 
abbreviation with these settings:
Before caret: << {
After caret: } \\ { } >>

If you set the shortcut of Expand Abbreviation to Ctrl-Shift-Space (as I 
do), you just write
yyCtrl-Shift-Space and there it is.

The second is not so simple, and is not exactly reproducible, but there 
is an easy way to parametrize abbreviations:
Before caret: <
After caret: >$1

Then you write:
q#2#Ctrl-Shift-Space
and get:
< | >2 (| is the cursor location)

Bert