If one were to represent the levels of communication, interplay and chemistry on Heatmap, the brilliant new album from saxophonist/composer Caleb Wheeler Curtis, the image would glow a consistent bright red. But take into account the range of dynamics, the span between explosive improvisation and sparse atmospherics, and youd end up with a full spectrum of vibrant colors. Which should come as no surprise given the individual voices and shared histories of a quartet that teams Curtis with pianist Orrin Evans, bassist Eric Revis, and drummer Gerald Cleaver. Due out via Evans Imani Records imprint, Heatmap is another bold step forward for Curtis, who has released two previous albums as a leader.