You should hear 'Come By Here' sung by a West African choir, with the very deep male voices rumbling down into "Oh.. Lord.." and the strange tone of the women's shrill upper reaches. It positively thrills the blood, and is nothing like the European or USA versions. I imagine something like the South African Ladysmith Black Mambaso choir would perform it just as superbly, and I believe the phonetic "Kum By Ah" represents southern African pronunciation.