To raise a note by an octave, add a high quote @code{'} (apostrophe) to
the note name, to lower a note one octave, add a `low quote' @code{,}
(comma). Middle C is @code{c'}
To raise a note by an octave, add a high quote @code{'} (apostrophe) to
the note name, to lower a note one octave, add a `low quote' @code{,}
(comma). Middle C is @code{c'}