Re: Note tails to be written both up and down

[Leo Correia de Verdier]

Do you mean like this:  
%%%%%%%%%%%
\version "2.20.0"
\new RhythmicStaff {
 << { 8 } \\  { 8 } >>
}
%%%%%%%%%%%

If so, to the program it is two eights in different voices, you can read more 
about it here:
https://lilypond.org/doc/v2.20/Documentation/learning/i_0027m-hearing-voices

If you want the whole part or a longer stretch to be written like that you 
could just write it in a single variable and give the same to both voices.

If you’re writing two percussion instruments on the same staff you might want 
to write them separately and combine them with \partcombine

HTH
/Leo

> 23 nov. 2020 kl. 09:09 skrev Emre PINARBAŞI <pardusemre@gmail.com>:
> 
> There is a situation I cannot do in the Lilypond program. When I write Rythm 
> staff on the single line staff, I want the note tails to be written both up 
> and down . How can I give this command?