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Re: function \transposition

From: Mats Bengtsson
Subject: Re: function \transposition
Date: Mon, 26 Oct 2009 17:12:06 +0100
User-agent: Thunderbird (X11/20070716)

Jean-François Lucarelli wrote:

First, excuse my poor english, but I've found a little bug in the "\transposition" command (for MIDI output).

For ascendent transposition (trupet e.g.), " \transposition d' " works correctly.
Also for descendant transposition (horn e.g.) " \transposition d " works also.

But for octave transposition (Contrabass e.g.), it doesn't works.

" \transposition c' " let the score inchanged, and " \transposition c " (without ' or ,) descend the score for two octaves.
As far as I can see, this is exactly what you should expect if you read the documentation. In http://lilypond.org/doc/v2.12/Documentation/user/lilypond/Displaying-pitches#Instrument-transpositions you see that the argument to the \transposition command is the pitch you want to hear when a c' is played, which obviously means that
\transposition c'
doesn't change anything, whereas
\transposition c
should provide a MIDI output that sounds one (not two) octave down compared to the notation, which it also does as far as I can see (and hear).

My version is "2.11.63"

Best regards, and congratulation for your big work.


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        Mats Bengtsson
        Signal Processing
        School of Electrical Engineering
        Royal Institute of Technology (KTH)
        SE-100 44  STOCKHOLM
        Phone: (+46) 8 790 8463                         
       Fax:   (+46) 8 790 7260
        Email: address@hidden
        WWW: http://www.s3.kth.se/~mabe

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