Re: lilypond-user Digest, Vol 168, Issue 174

[Graham Breed]

On 21/11/16 13:51, address@hidden wrote:
> Message: 5
> Date: Mon, 21 Nov 2016 09:42:33 +0100
> From: Urs Liska <address@hidden>
> To: lilypond-user <address@hidden>
> Subject: Pitch bend output in MIDI
> Message-ID: <address@hidden>
> Content-Type: text/plain; charset=utf-8
>
> Hi,
>
> I want to use Pitch Bend to detune the output in MIDI files. The NR
> states that pitch bend is supported but doesn't give any information how
> it is applied.
>
> Apart from that I've only found this LSR snippet
> http://lsr.di.unimi.it/LSR/Snippet?id=785 but I must admit I don't
> really understand where and how the pitch bend is actually produced.
>
> What I need is to apply it within a music function that returns a note,
> and this should apply the detuning.
>
> Any hints appreciated.

The pitch bend bends a pitch from equal temperament to the pitch 
specified in Lilypond.  It adds a pitch bend before the note on, and 
resets to zero pitch bend after the note off.

There's a script here that convert's the pitch bends into MIDI Tuning 
Standard messages that work polyphonically with Timidity:

http://x31eq.com/lilypond/addmts.py3

If you want to detune a note, you need to set a pitch that's different 
to equal temperament.  You probably know the Lilypond pitch system, but 
anyway, it's explained here:

http://x31eq.com/lilypond/


The latest code for just intonation is at 
https://bitbucket.org/x31eq/microlily


             Graham