Double Measures - Time Signatures.

[Trent J]

Hello

I have a few questions about doubling measures and time signatures.

I currently typesetting Monteverdi's Vespers and have run into some problems 
with Monteverdi's notation. I want to keep the original baring and time 
signatures as they reflect the phrasing and tempo's of the work (Monteverdi 
was still using proportional notation)

My question is this:

Is there a way to double or triple the length of a bars. Monteverdi will set 
a time signature of 4/4 but infact it's 8 beats to a bar and also 3/2 which 
again is more like 6/1 (6 breves or 12 semibreves to a bar.)

Is it possible to do

\time 4/4 { g4 g4 g4 g4 g4 g4 g4 g4 }* 2/1

or

\time 3/2  { g1 g1 g1 g1 g1 g1 }* 6/1 ??

The reason for this is that Monteverdi can and does move between the 8 beats 
in 4/4 time back to 4 beats and back to 8 beats often during a work.

I know I can fiddle around with hiding and using markups for time signatures 
etc this causes the excellent Layout properties of Lilypond to become 
corrupt.

Using the \cadenzaOn / Off... is also useful but this creates a lot of 
problems especially when proof-reading later and \cadenza causes all the 
accidentals to stay active...

Thanks for any assistance.

Regards,

Trent

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