Changing breathe marks to markup text

Other snippets show how to replace a breathe symbol by some other symbol. This snippet extends that idea by:

• Changing the voice context so that all breathe symbols in the score are replaced.
• Using arbitrary text rather than just a symbol to replace the breathe symbol.

In this example the breathe symbol is replaced by the comma character from the Helvetica font. This character is enlarged and slightly raised using the \raise markup function.

\version "2.24"

%% http://lsr.di.unimi.it/LSR/Item?id=640

\layout {
  \context {
    \Voice
    \override BreathingSign.font-name = #"Helvetica"
    \override BreathingSign.font-size = #8
    \override BreathingSign.text = #(markup (#:raise 0.2 ","))
  }
}
\new Staff {
  \relative c'' {
    b4 b \breathe b b
  }
}