Me last night making weird noises while reading Wikipedia and trying to figure out Tamil pronunciation. It says intervocalic ற is trilled and ர is tapped but that's definitely not what I heard in the yt video I had just watched...
There are actually B, C and D formats with the same properties, just scaled up or down slightly if you need something in between, for example B4 is basically A3.5, C4 is A3.75 and D4 is A4.25 if you plug it into the power-of-2 formula. (Later, C and D were removed because very few people used the quarter-steps.)
Been trying to do more reading before bed. I think avoiding backlit screens helps me transition to sleep more easily. I really recommend an eInk based ereader to anyone who likes reading but hasn't tried one.