Publisher Desc.  "Dark Obsidian" was one of my first big band arrangements. Obsidian is another word for natural glass that is very pretty and smooth to the touch. This tune is a multi-meter Latin tune that frequently switches from 4/4 to 3/4 with navigation through some fairly complex chord progressions. The feel is like a bossa nova with the 3/4 measures feeling like a beat is dropped, adding tension to the phrase endings. This tune would make a neat addition to the latin jazz genre section of any jazz band's repertoire.