Metronome-Register names a function, with lambda list (TASK):
Safely register TASK with the metronome.
Most users will prefer TOOTSVILLE DO-METRONOME for that purpose. See also TOOTSVILLE RUN-METRONOME-TASKS for a discussion of the metronome, and TOOTSVILLE METRONOME-REMOVE for the complementary function.
Defined in file src/metronome.lisp.