Pitches entry 3 - octaves

The optional octave specification takes the form of a series of single quote (`) characters or a series of comma (`,') characters. Each ' raises the pitch by one octave; each , lowers the pitch by an octave

\version "2.24"

%% http://lsr.di.unimi.it/LSR/Item?id=154

{
  c' c'' es' g' 
  as' gisis' ais'
}