Real measurements of the actual dynamic range of some commercial recording, thanks to the DR software of the Pleasurize Music Foundation. TNT AUDIO – www.tnt-audio.com Tamuc February 4 Elementary Music Workshop Grove, Elgin • Feb. 21 — African-American drums and storytelling, 8:30 a.m., Heritage Elementary. music through Guide Right and the Diamond Foundation, 7 p.m., Bartlett High School, 701 W. Schick. Chorus and instrument students will showcase a variety of…