How can I apply default automatic beam logic for 4/4 meter to a piece written in 2/2 meter

[田村 淳]

I’ve been using Lilypond for a while but new to the lilypond-user list. I’m 
sorry if the above question has been asked for zillion times in the past.

I understand that I could most likely be able to achieve what I want by 
re-defining baseMoment and beatStructure, and cut-and-paste the contents of 
beamExceptions from ‘scm/time-signature-settings.scm’ but I thought that there 
might be a bit easier and more elegant way to achieve the same.

I’m typesetting the 1st movement of J. S. Bach’s 5th Brandenburg concerto. Bach 
used ‘alla breve’ time signature but the music is actually 4/4 (or common time) 
in a modern sense. If I set "\time 4/4” then the automatic beam works almost 
perfectly. Very little manual tweaking is required.

Thanks in advance for your help.

Jun