I mean depending on how you look at it, one could argue that rock and roll... along with several other genres we all enjoy today... most definitely had their roots in Africa.
We brought millions of slaves over from Africa and singing was pretty much all they had. Literacy was out of the question so their ancestral lore was passed down via song for several generations. As time went by and Christianity set in, the same basic melodies that were centuries old and originated in Africa, were soon adapted to the words and stories of the Old Testament and also the words of Jesus. The "Negro Spiritual" gave hope for a better existence in the life hereafter. They were also used covertly for what at the time would be considered subversive expression.
As more time passed, Gospel Music refined the early spirituals and rapidly gained popularity not just among the slaves, but whites as well. After the Civil War, when blacks were "free"... things weren't much better, but from those same melodies, arose the The Blues. I can stop there as we all know what happened next. Elvis, and then a handful of now iconic Brits that were listening on AM radios to music out of the Mississippi Delta because everything they had in Europe sucked... picked up electric guitars, bass, and drums... and changed music forever.
Soooo.... as inventions go, yeah maybe we didn't get a lot of mechanical things from Sub-Sahara Africa... but what would this world be like without music? One song has the power to unite millions, so as far as I'm concerned.... one of the greatest inventions in all of mankind's existence, or cultural additions if you will, originated in Africa. Makes sense really. The very best songs almost always find their roots in pain.