Hi Trevor wikipedia article call those time sigs as "irrational" meters: http://en.wikipedia.org/wiki/Time_signature further investigation showed that Ferneyhough himself calls them "irrational", so, probably, this is a quite good definition: http://www.sospeso.com/contents/articles/ferneyhough_p1.html
in my experience this notation is quite useful if you have a broken bar that it would be impossible to write differently, even if many players told me that they prefer to see an incomplete bar (even without time signature) with the tuplet sign (or with nested tuplets) because for them the rhythmical relation with previous bars is more direct than with a change of time sig. my 2 cents regards, Libero > > > > > > If anybody has a good name for these meters, I would love to steal. > > > > n-ary meters? [...he offered, only half-jokingly...] > > > -- Libero Mureddu Vanha Viertotie, 21 as 417 00350 Helsinki Finland http://webusers.siba.fi/~limuredd/ http://www.myspace.com/liberomureddu
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