Bincika Guru's Jazzmatazz, Vol. 4: The Hip Hop Jazz Messenger: Back to the Future na Guru, wanda aka saki a ranar 30/07/2007. Kundin waƙoƙi 16 wanda ya haɗa da 'Cuz I'm Jazzy', 'Universal Struggle', 'Infinite'. Samu cikakken kididdigar yawo, nazarin kowace waƙa, da ma'aunin shiga na masu sauraro.
