Piano sustain pedal

[Martin Tarenskeen]

Hi,

I am typesetting a Piano solo score.
I want to add \sustainOn and \sustainOff stuff in my lilypond source only 
for more realistic MIDI output, but I don't want to print the 
pedalmarkings in my score. How to do this? If possible without the need to 
have separate midi and layout versions of the same lilypond code for the 
notes.

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MT