@item -k, --key=@var{acc}[:@var{minor}]
Set default key. @math{@var{acc} > 0} sets number of sharps;
@math{@var{acc} < 0} sets number of flats. A minor key is indicated by
-":1".
+@samp{:1}.
@item -o, --output=@var{file}
Write output to @var{file}.
ABC is a fairly simple ASCII based format. It is described at the ABC site:
@quotation
-@uref{http://@/www@/.gre@/.ac@/.uk/@/~c.walshaw/@/abc2mtex/@/abc@/.txt}.
+@uref{http://@/www@/.walshaw@/.plus@/.com/@/abc/@/abc2mtex/@/abc@/.txt}.
@end quotation
@command{abc2ly} translates from ABC to LilyPond. It is invoked as follows: