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\compoundMeter cannot handle irrational or fractional meters

From: Joseph Rushton Wakeling
Subject: \compoundMeter cannot handle irrational or fractional meters
Date: Wed, 01 Aug 2012 12:30:49 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:14.0) Gecko/20120714 Thunderbird/14.0

Lilypond currently supports simple "irrational meters" like 4/10, 7/6, etc. which are used by contemporary composers such as Ferneyhough, Adès, etc.

However, \compoundMeter cannot handle many of these complex notations. It sometimes fails when an irrational component such as 1/10 is included in the compound meter, and fails when a _fractional_ value such as 2/3 is included in the compound meter -- as in Boulez' "Le marteau sans maître" where there are time signatures such as (4 + 2/3)/8 .

I've attached 3 minimal examples, 2 which fail with the compound meter but compile with the equivalent non-compound irrational meter; and one which includes a compound irrational meter that works.

Attachment: compound-irrational.ly
Description: Text Data

Attachment: compound-fractional.ly
Description: Text Data

Attachment: compound-irrational-works.ly
Description: Text Data

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