Sam Rivers' trio with Dave Holland and Barry Altschul (not pictured) recently released its 2007 reunion show on CD. Ken Weiss/Courtesy of the artist hide caption

itoggle caption Ken Weiss/Courtesy of the artist

The Analog Players Society was assembled by a producer and percussionist in his mid-30s who calls himself Amon. Courtesy of the artist hide caption

itoggle caption Courtesy of the artist

Brad Mehldau's latest covers project, Where Do You Start, came out Tuesday. Michael Wilson /Courtesy of the artist hide caption

itoggle caption Michael Wilson /Courtesy of the artist