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Re: \transposition question


From: Flaming Hakama by Elaine
Subject: Re: \transposition question
Date: Thu, 31 Aug 2017 16:13:37 -0700



---------- Forwarded message ----------
From: Gregrs <address@hidden>
To: Menu Jacques <address@hidden>
Cc: Lilypond-usermailinglist <address@hidden>
Bcc: 
Date: Thu, 31 Aug 2017 21:52:00 +0100
Subject: Re: \transposition question
On Thu, Aug 31, 2017 at 09:50:05PM +0200, Menu Jacques wrote:

Hello folks,

I’m trying to understand how \transposition works with enharmony.

In the following, what key should be chosen (instead of D major) in the fourth score for a soon-to-be-created Trumpet in A#?

For the Trumpet in Bb, the piano's C becomes a written D. The interval between C and the note in the instrument's name (Bb) is a major second, as is the interval between the C and the D.

The same thing happens with the horn; C to Eb is a minor third, and so is C to A.

So theoretically in order to write for the trumpet in A# (a diminished third away from C), I think you'd have to use the key of Ebb major (which doesn't exist) as this is a diminished third away from C in the opposite direction.

Hope that helps!
Greg

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The transposing interval of an instrument is not a harmonic context.

It is not like you are hearing a C against a Bb/A#, and need to determine if the interval is a 2nd or a diminished 3rd.

Rather, you are hearing a C against a C, and the rest is mental gymnastics.



David Elaine Alt
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