On Thu, Sep 13, 2012 at 12:00 PM, Dan MacDonald <allcoms@gmail.com> wrote:

I'm sure
Paul or someone will correct me if its no longer the case but last
time I checked you could only change tempo on the first beat of a bar
under A3 so if thats still the case then you may not even be able to
fake a reasonably rapid tempo change well.

tempo changes can occur on any beat; meter changes must occur at the start of a bar/measure.