Useful - mix
Here is the Alex's video which accompanies his talksAPRESENTAÇÃO DAS BATERIAS DAS ESCOLAS DE SAMBA DO GRUPO ESPECIAL DO RIO DE JANEIRO - 2011
- just what it says on the tin
And here is a great talk by Evelyn Glennie
Profoundly deaf since the age of twelve, she's become the leading solo concert percussionist
And some excellent and straightforward examples of common Samba drum patterns.