When it comes to music, South Africa often likes to keep its greatest talent unheralded. Bheki Khoza, the guitarist, composer, arranger and music teacher should be a national treasure, but he is known only to a handful of music lovers. Khoza has one of the most distinctive sounds on the guitar, with lightning speed and unmatched musical intelligence. But he is not the first to have a prodigious talent, but suffer relative obscurity. The guitarist Madala Kunene and the pianist