Re: MIDI instrument for oboe d'amore

[David Kastrup]

Jacques Menu <address@hidden> writes:

>> Le 1 mai 2019 à 10:01, David Kastrup <address@hidden> a écrit :
>> 
>> Jacques Menu <address@hidden> writes:
>> 
>>> Unfortunately, \transposition can only be used when the notes are written 
>>> in «
>>> instrument » pitch, not concert pitch.
>> 
>> Says who?
>
> The LPNR:
>
> The pitch to use for \transposition should correspond to the real
> sound heard when a c' written on the staff is played by the
> transposing instrument. This pitch is entered in absolute mode, so an
> instrument that produces a real sound which is one tone higher than
> the printed music should use \transposition d'.  \transposition should
> only be used if the pitches are not being entered in concert pitch.

After using \transpose, they are not in concert pitch.

>> BTW, it could be better named as something like
>>> \transposingInstrument, it seems.
>> 
>> Why?
>
> Would be more explicit: transposition can be understood as the act of
> transposing,

"transposition" is not a verb.  And it describes the relation between
printed pitch and Midi pitch without necessarily referring to an
instrument.

> whereas \transpose exists too.
>
>> I started by writing the code to obtain the same score as the
>>> manuscript shown below, where the first staff is written for a viola,
>>> hence my notes are in concert pitch.
>>> 
>>> Then I added \transpose to have it printed for an oboe d'amore:
>>> 
>>> 
>>> But then I can no longer proof it by ear without changing the MIDI
>>> output too, which I don’t know how to do.
>> 
>> With \transposition .
>
> I did various attempts at that, but was unsuccessful.
>
>> I’d prefer to keep the notes unchanged, in concert pitch, instead of
>>> modifying them - hence my post.
>> 
>> How about a minimal example exhibiting the problem?
>
> I extracted the first two measures so that the phenomenon is clear, sorry if 
> that’s a bit long.
>
> Comment the line :
>
>           \transpose a c' % <<<<<<========= HERE
>
> to hear the music as it I need it to sound.
>
> JM
>
>
> %%%%%%%%%%%%%
>
> \version "2.19.82"
>
> Part_POne_Staff_One_Voice_One = \relative {
>   \partial 2
>   \key bes \major
>   \numericTimeSignature \time 3/2
>   g'2 | % 1
>   g1 g2 | % 2
> }
>
> Part_PTwo_Staff_One_Voice_One = \relative {
>   \partial 2
>   \key bes \major
>   \numericTimeSignature \time 3/2
>   \clef "bass"
>   ees'2 | % 1
>   d1 ees2 | % 2
> }
>
> Part_PThree_Staff_One_Voice_One = \relative {
>   \partial 2
>   \key bes \major
>   \numericTimeSignature \time 3/2
>   \clef "bass"
>   c'2 | % 1
>   b!1 c2 | % 2
> }
>
> \score {
>   <<
>
>     \new StaffGroup <<
>
>       \new Staff = "Part_POne_Staff_One"
>       \with {
>         instrumentName = "Hautbois d'amour"
>       }
>       <<
>         \context Voice = "Part_POne_Staff_One_Voice_One" <<
>           \transpose a c' % <<<<<<========= HERE
>           \Part_POne_Staff_One_Voice_One
>         >>
>       >>
>       \new Staff = "Part_PTwo_Staff_One"
>       \with {
>         instrumentName = "Basson 1"
>       }
>       <<
>         \context Voice = "Part_PTwo_Staff_One_Voice_One" <<
>           \Part_PTwo_Staff_One_Voice_One
>         >>
>       >>
>
>       \new Staff = "Part_PThree_Staff_One"
>       \with {
>         instrumentName = "Basson 2"
>       }
>       <<
>         \context Voice = "Part_PThree_Staff_One_Voice_One" <<
>           \Part_PThree_Staff_One_Voice_One
>         >>
>       >>
>
>     >>
>
>   >>
>
>   \layout { }
>
>   \midi {
>     \tempo 2 = 90
>   }
> }
>
> %%%%%%%%%%%%%
>

I hear nothing wrong with

\version "2.19.82"

Part_POne_Staff_One_Voice_One = \relative {
  \partial 2
  \key bes \major
  \numericTimeSignature \time 3/2
  g'2 | % 1
  g1 g2 | % 2
}

Part_PTwo_Staff_One_Voice_One = \relative {
  \partial 2
  \key bes \major
  \numericTimeSignature \time 3/2
  \clef "bass"
  ees'2 | % 1
  d1 ees2 | % 2
}

Part_PThree_Staff_One_Voice_One = \relative {
  \partial 2
  \key bes \major
  \numericTimeSignature \time 3/2
  \clef "bass"
  c'2 | % 1
  b!1 c2 | % 2
}

\score {
  <<

    \new StaffGroup <<

      \new Staff = "Part_POne_Staff_One"
      \with {
        instrumentName = "Hautbois d'amour"
      }
      <<
        \context Voice = "Part_POne_Staff_One_Voice_One" <<
          \transposition a
          \transpose a c' % <<<<<<========= HERE
          \Part_POne_Staff_One_Voice_One
        >>
      >>
      \new Staff = "Part_PTwo_Staff_One"
      \with {
        instrumentName = "Basson 1"
      }
      <<
        \context Voice = "Part_PTwo_Staff_One_Voice_One" <<
          \Part_PTwo_Staff_One_Voice_One
        >>
      >>

      \new Staff = "Part_PThree_Staff_One"
      \with {
        instrumentName = "Basson 2"
      }
      <<
        \context Voice = "Part_PThree_Staff_One_Voice_One" <<
          \Part_PThree_Staff_One_Voice_One
        >>
      >>

    >>

  >>

  \layout { }

  \midi {
    \tempo 2 = 90
  }
}

%%%%%%%%%%%%%


-- 
David Kastrup