Fw: Pentatonic Diatonic Transposition?

[Trevor Daniels]

The code below seems to satisfy a request
seen several times on -user.  Assuming the code
is good I'd prefer to see this added to the LP
distribution rather than the LSR.

What do you think?

Trevor

----- Original Message ----- 
From: "Michael Ellis" <address@hidden>
To: "Daniel" <address@hidden>
Cc: <address@hidden>
Sent: Saturday, January 22, 2011 11:45 PM
Subject: Re: Pentatonic Diatonic Transposition?


> On Sat, Jan 22, 2011 at 12:09 AM, Daniel 
> <address@hidden> wrote:
> > Lilypond is awesome!
>
> I agree!  This topic was interest to me, so here's a cut at a 
> working
> solution based on my earlier post.  The attached file,
> modaltranspose.ly defines a new music function, \modalTranspose 
> that
> works almost like the normal chromatic \transpose but takes one 
> extra
> argument: the scale to use for the transposition.   Here's the 
> usage
> example from the file
>
> %% ---------- Demo ------------------------------
>
> %% Just to show it works with normally transposed music, too:-)
> dPentScale =  \transpose c d { c'4 d' e' g' a'1 }
> mymotive = \transpose c d { c'4 c' e' d' c'1}
>
> %% And here's an octatonic example
> cOctatonicScale = {c'4 d' ees' f' ges' aes' a' b'}
> octamotive = {c'4 ees' ges' a' b' aes' f' d' }
>
> \score {
>     \new Staff {
>        \tempo "" 2=120
>        \mark "Pentatonic"
>        \dPentScale
>        \mymotive
>        \modalTranspose d' e' \dPentScale \mymotive
>        \mymotive
>        \break
>        \mark "Octatonic"
>        \cOctatonicScale
>        \octamotive
>        \modalTranspose c' a' \cOctatonicScale \octamotive
>        \octamotive
>        {ees'1} %% Can't stand not resolving :-)
>     }
>
>    \layout {}
>    \midi {}
> }
>
> %% -------------------------------------------------------------------
>
> Seems to work with arbitrary scales, but be aware that the code 
> will
> (intentionally) throw an error if any pitch in what you're 
> transposing
> is not in the scale.  I'm not sure what other result is reasonable 
> for
> arbitrary scales.
>
> The code Probably has some other bugs, too :-)  I'm open to
> suggestions for improvement before I submit it to LSR.
>
>
> Cheers,
> Mike


--------------------------------------------------------------------------------


> _______________________________________________
> lilypond-user mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/lilypond-user

modalTranspose.png
Description: PNG image

modaltranspose.ly
Description: Text Data