How to transpose an entire piece of music?

[Bernhard Kleine]

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I had a christmas carol "Zu Bethelem geboren" with is in F-Dur. That
piece has a bass voice going to "großem F" more than once. Since the
other voice are not at all at their upper limit, I thought to
transpose the carol by 1 or 2 tones to G-Dur or A-Dur.

This turned out difficult for the following reason.

Using the \transposition with the \score

\score {
    \transpositon D {
        \new ChoirStaff <<
...

        >>
    }
    \layout {}
    \midi {}
}

gave error: wrong Typ of Argument 1, pitch expected, "D" found

I than used \transpose for individual voices, which lost the \relative
c'' property and the notes had to be individually positioned.
Furthermore the whole piece is still noted in F-Dur which makes for
some unusual naturals.

Is there a way to raise an entire piece of music by one note value?
Thank you very much.

Regards
Bernhard

soprano = \relative c'' {
  \global
   \transpose f a {
  c'4| f'4. g'8 a'4 g' | f'2 e'4 \breathe f' |g' f'8 g' a'4 g' | f'2
h'4\rest c'' \break
  c'4 a' b' c'' | d''2 b'4 \breathe b' | a' b' c'' b'8 a' |g'2.
h'4\rest \break
  c'2 g' | a' g'4 a' | c'' f'8 g' a'4 g' |f'2. \bar "|."
}}
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