I got the DVD. In a nutshell, it's excellent. There are six rhythms, divided into level 1 and level 2 groups.
Level 1:
- Kalafedon
- Nafadima Nen
- Denaben Dunun
Level 2:
- Numuka Bolon
- Nanalen
- Soli Gnamalo
For each rhythm, you get a clear demonstration of the separate parts, similar to Mamady's DVDs, plus ensemble play. For some of the rhythms, you also get the track with four of the five instruments playing, so you can fill in the missing fifth one.
This is a really nice DVD if you are just past the beginning stages because it teaches these six rhythms very clearly. But it's nice for intermediates too: there are set solos for the rhythms that are played separately by Billy at slow tempo, and again with the ensemble. So, you get to learn new solo phrases. Finally, for advanced players, Billy improvises to the rhythms, and many of the phrases are not simple ones, so you can pick up yet more soloing ideas. (That part is very similar to "Akaran Iko Iko": lots of solo phrases, but no explanation or break-down.)
There are three tracks with a bit of material about Billy's musical upbringing and background, Mandingue culture, and playing technique. None of these tracks is particularly outstanding, but they nicely round out the DVD.
My one criticisms: there is zero cultural background info for the rhythms, so I have no idea where they come from, who plays them, or for what reason. Personally, I don't recognize a single one of these rhythms, and I suspect that they might all be compositions of Billy's. (If anyone knows anything about these rhythms, please let me know!)
Edited to add: I missed that the back of the inside sheet contains rhythm notes (French only), so there is some cultural background information on the rhythms after all. Five stars it is now. See here for a translation of the notes.
Overall, I'll give this four out of five stars. (With some background info on the rhythms, it would have been five starts.) This DVD is definitely worth adding to your collection!
Cheers,
Michi.