Hello,

Thanks you for the quick reply

works like a charm 🙂

-----
 Seb

________________________________
From: Michael Werner <reznae...@gmail.com>
Sent: Wednesday, December 13, 2023 17:19
To: Sebastien Richard <richards...@hotmail.com>
Cc: lilypond-user@gnu.org <lilypond-user@gnu.org>
Subject: Re: Hide a note inside a drumscore

Hi Seb,

On Wed, Dec 13, 2023 at 11:00 AM Sebastien Richard 
<richards...@hotmail.com<mailto:richards...@hotmail.com>> wrote:
Hello,

How can I hide a note inside a drum score ? I tried following the doc here 
https://lilypond.org/doc/v2.23/Documentation/notation/visibility-of-objects but 
I did not managed to make it work

The issue you are running into is that overrides won't work on a single item 
when there's more than one of them happening at the same moment in the music. 
As these are (basically) notes within a chord, they're at the same moment. And 
the \hide command is just a shortcut for an override on the grob's Transparent 
property. In the case of simultaneous grobs, you want the \tweak command. 
http://lilypond.org/doc/v2.25/Documentation/notation/tweak-and-single

So, your code would become:

\version "2.24.2"

up = \drummode {
  \slurDown \grace { sn16 sn( }  <cymc \tweak transparent ##t sn) bd>4
}

\score {
  \new DrumStaff <<
    \new DrumVoice {
      \voiceOne \up
    }
  >>
  \layout {}
}

--
Michael

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