In my never-ending quest to find jazz groups of atypical instrumentation and configuration, it never occurred to me that one possibility might be a quartet where four people play the same kind if instrument. Which may be why — despite recording three dozen albums — I’m only just now hearing about the aptly-named ROVA Saxophone Quartet, courtesy of their new album, The Circumference Of Reason (CD, digital). But if Reason is any indication of what they’ve been up the past 24 years, I have a lot of questing into their back catalog to do.