Re: Swing Midi

[Mats Bengtsson]

I wouldn't be surprised if you could find some
program the took and existing MIDI file and added
the swing feeling to it. However, I agree that it could
be an interesting exercise in Scheme programming to
do it from within LilyPond.

 /Mats

David Greene wrote:

> Hi everyone,
>
> I searched the archives and found a few discussions about
> generating swing-feel MIDI from straight eighths Lily
> source but the most recent was from 2004.
>
> I was thinking about writing a Scheme function to carve
> up all of the durations into units of eighths, inserting
> the proper ties to maintain longer notes.  Then I could
> imagine altering the durations as appropriate to implement
> the swing feel.
>
> Can anyone give me an idea of the complexity of this?
> I can imagine writing it in such a way that the "swing
> bias" can be specified (e.g. triplet, quintuplet, etc.).
>
> I know only as much Scheme as is covered in the 2.9.17
> manual, which is to say, not much.  What is the recommended
> reference?  SICP?  I could do this in C++ with no problem,
> but Scheme is a very different beast.  I'm not at all sure
> how to do complex data structure manipulation in it.
>
> Might it be easier to do something with Perl or a similar
> text-processing language to alter the Lily source directly?
> It would be nice to have a music function that others could
> share.
>
> The main reason I want to do this is not to generate
> perfect-sounding music but to be able to give a new
> score and accompanying MIDI to people learning new stuff.
>
>                               -Dave
>
>
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--
=============================================
        Mats Bengtsson
        Signal Processing
        Signals, Sensors and Systems
        Royal Institute of Technology
        SE-100 44  STOCKHOLM
        Sweden
        Phone: (+46) 8 790 8463                         
       Fax:   (+46) 8 790 7260
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