That's Tchacou-Totapen. No they didn't left. Primus Engoudouka was came out before Obligatoire. There was Tchacou Totapen. But Extra Musica's system is diffrent than Quartier Latin & Maison Mere. You can't become first-member immediatly. You have to spent some years. Guys like Kerson, Typhoide Tarzan and Rossen Yaourt were there already since 2000 and are just the few of the many musiciens for were then members of Extra Musica. Yes, It took me also some time to accept Obligatoire, because I was also missing Papy Jah. Others reasons were that Roga Roga in my opinion wasn't really motivated as solist like in previous albums and the level of Trop c'est Trop was to high. But Obligatoire is still excellent an excellent album.