Re: Enhancement: command line option to transpose N halftones up or down

[Simon Albrecht]

Am 16.03.2015 um 17:43 schrieb Michael Schuerig:
> On Monday 16 March 2015 11:26:30 David Nalesnik wrote:
> > Am 16.03.2015 um 15:02 schrieb Michael Schuerig:
> >
> > I've only been using LilyPond for a rather short time, so far mostly
> > for engraving short snippets transposed into several keys for
> > practicing. Of course, the transpose command works nicely for this.
> >
> > However, it made me think of how transposing could be even nicer and
> > now I'm wishing for a command line option to the lilypond command to
> > transpose the engraved document by N halftones up or down. The
> > particular advantage would be that this way the original document
> > doesn't need to be changed in any way in order to transpose it.
> >
> > If you're simply dealing with numbers of semitones, how would you be
> > able to control whether the output begins on, say, F# versus Gb?
> Fair question -- I have no idea. I came up with the semitones so that
> the direction, up or down, is made explicit instead of left to LilyPond.
This is normally achieved through
\transpose c fis \music (up an augmented fourth) versus
\transpose c fis, \music (down a diminished fifth).

HTH, Simon