MVB (Most Valuable Band): Many thanks to the reader who emailed me with an imperative, not a request, to hear Chico Freeman (son of fellow tenor sax man Von, nephew of guitarist George) headline Jazz Showcase Oct. 27-30 with a gangbuster quintet: guitarist Mike Allemana, pianist Julius Tucker, bassist Christian Dillingham and drummer Kyle Swan. The icing on this multitiered cake was Swiss percussionist Reto Weberplaying the Hang, a steel drumlike instrument.