Nigel,
Loved the Bakia Pierre clip.
Sorry to have to add to the long list of music that you need to investigate - but are you aware that both the Bakia Pierre clip and the Baziri Teofili clip that I pointed to are part of the extraordinary collection by the great South African ethnomusicolgist Hugh Tracey?
His work in the 1950s pioneered the documentation of a great body of neglected, extremely high quality music from quite a number of African countries - and working as early as 1951, he made recordings of superb quality, both musically and in terms of their recording quality. Around a dozen of them were subsequently released on the Sharp Wood label, all taken fron the extensive Hugh Tracey Archive which you can read about at http://www.muzikifan.com/tracey.html The only place that I know on the internet where this wonderful neglected music is still avaialable is from http://www.swp-records.com/ - but you are a rich, record-label owner, Nigel. Give your ears a reall treat - buy all of them!

And a big thanks to Al, for creating this very interesting thread drift. It has brightened it up no end!