Re: New snippet: remove staff if another is alive (for wind divisi)

[Thomas Morley]

2018-08-09 0:09 GMT+02:00 David Kastrup <address@hidden>:
> Thomas Morley <address@hidden> writes:
>
>> 2018-08-08 22:21 GMT+02:00 Thomas Morley <address@hidden>:
>>
>>>
>>> Well, this whole post was meant to explain my thoughts while coding
>>> the example from my previous mail.
>>> I expected the code to fail like my previous.
>>> It doesn't.
>>> Though, even after your hints above, what's the essential difference?
>>>
>>> I'll investigate.
>>
>>
>> The essential difference is the rhythm of the control-voice.
>> The code below never prints single instrument staves.
>> But changing in controlDivisi
>> s4 s s s -> s1
>> works.
>>
>> Changing
>> s4 s s s -> $#{ s4 s s s #}
>> works as well.
>>
>> WTF?
>
> Bit of a red herring here.  Those two sequences produce the same music
> but the first one sets the default duration to 4 while the second one
> leaves it unchanged at the previous value of 1, and the next skip then,
> lacking a duration of its own, gets a duration of 4 and 1, respectively.
>
> Same with s4 s s s -> s1 .  That's one reason why it is a good idea to
> use an explicit duration for the first note of each line, making the
> line's meaning independent from how the last line ended (at least
> regarding the duration).
>
> --
> David Kastrup

Or with other words, the rhythm is wrong in the line labeled with  %% <==

controlDivisi = {
  \switchOn
  s4 s s s
  \switchOff
  s %% <==
  \switchOn
  s1
}

And I'm blind ... at least today.

Thanks,
  Harm