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Re: beatLength / beaming in 4/4

From: Gerard McConnell
Subject: Re: beatLength / beaming in 4/4
Date: Mon, 14 Jun 2010 21:20:36 +0100

For these sort of situtaions I turn \autoBeamOff and use
[ ] to write beams as required. 
----- Original Message -----
From: u_li
Sent: Monday, June 14, 2010 12:24 PM
Subject: beatLength / beaming in 4/4

[sorry if this should be a double post. When I first sent the message I didn't configure my current email client to use my registered address. As I don't see my post on the list I assume it didn't get through. If it did please ignore this second post ]

Dear community,

it seems I have yet another problem with automatic beaming (similar to problems I read about recently).
What I want LilyPond to do is to beam consecutive 32th notes in a 4/4 time in groups of 4 (i.e. 8 groups of 1/8 length each).
From what I understood from the manual I should simply have to
   \set beatLength = #(ly:make-moment 1 8)
to achieve the desired result.

But as you see in the attached example LilyPond gives me four groups of the desired length and puts the rest of the bar under one beam.
This is the same with different beatLengths (in the example I kept only 3 32, but it's the same for 1 16 or 3 16 etc.).

In "\time 5/4" everything works as expected
In "\time 3/4" I have one beam for each quarter note, regardless of the beatLength.

I also looked at beam-settings.scm but can't understand if this is an issue of correctly overriding the beamSettings (as I have a very hard time understanding this anyway) or a bug. For me it looks like after some counter variable has reached 4 (the numerator?) somethings goes wrong with the beaming mechanism.

Thanks in advance for any hints (as I really don't look forward beaming half the piece (the 2nd parts of each bar ;-) ) manually).


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