There's no conductor other than the organist moving his mouth and bobbing his head (with his own organ part being a pretty challenging part), the choir has to negotiate some 3/8 measures whereby they have to sing four over three, in addition to some measures where they have to sing two over three (a little bit easier, but they actually tend to rush the two over three measures, whereby the beat should stay very steady and rhythmic in this entire anthem), there's a place where the anthem sort of starts over with an organ trill - which defines fairly nebulous time, YET the timpanist and I have to come in together (with an offset hemiola, no less...you know, liking Symphonie Fantastique) and - to make things even more challenging, pulse-wise - the brass quintet is separated - with the three low brass on one side of the organ and the two trumpets and the timpanist on the far side, so we (the timpanist and me, in particular) can barely hear each other...
... so I spoke up for the quintet (even though I didn't ask anyone's permission) and I made it clear that we were willing to spend as much time as needed on the anthem (outside of the time that we needed to spend on all the other things we were playing) to tighten up a whole bunch of issues that needed to be addressed in the anthem. so that both performances in tomorrow's services would be really good, and worth the money he is paying for us to be there (which is a lot).
I could tell that the organist/choirmaster was really feeling like he had to keep moving, and make sure that he covered everything before our scheduled rehearsal was over, but it just seemed to me that it was more important to get everything right, rather than finish the rehearsal on time (after all, he picked that piece for this year's big anthem, and obviously he was really looking forward to performing it)... We took the time needed to write in some cues, to go over some really difficult passages several times until we "felt" them properly, and in order to take note of when the choir's execution of some rhythmic figures wasn't quite right (so we could shift how we are tapping our feet
