The Sound Test Room made a nice review about Brazilian Drum Machine where you can get a quick idea of grooves and how to work with the app.
Brazilian Drum Machine is the new brazilian rhythm section for iPad and iPhone. Easy, fast and flexible because you can use the preprogrammed rhythms or create your own grooves. Combine rhythms with the fast and intuitive Song Mode.
• Complete rhythm library with all the amazing brazilian grooves. Samba, Partido Alto, Baião, Bossa Nova, Marcha, Choro, Carimbó, Maracatú, Coco, Xote, Maxixe, Makulele, Calango, AfroSamba, Coco, Frevo, Ijexá, Calango, Capoeira … and many more!
• More than 60 brazilian percussion sounds with Round Robin alternating samples with 4 layers. Extremely realistic sounds, including Pandeiros, Caixixis, Surdos, Cabasas, Tamborims, Ganzá, Shaker, Chocalho, Caixas (Snares), Agogos, Atabaques (Congas), Drum sets, … and many more!
• Jamming Mode to set the improvisation level. The acclaimed improvisational ability has been adapted to Brazilian percussion. No one may guess that is a machine!
• Set drum fills every x bars, with brazilian triplet feel that makes the groove to sound incredibly human.
• Song Mode allows to make full structures in seconds. Just adding parts choosing rhythms, number of bars, jamming level and fills. Easy, fast and fun.
• Create your own rhythms in two modes: Step Sequencer and Patterns wheels.
• Ranzomizers tools for sounds and patterns to boost the creativity.
• Grooves divided into banks to facilitate searching: Samba – Bossa Nova – Forró – Afro – Marcha – Folclore – Bateria (Drumset) – User – Favourites
• Bateria (Drumset) bank with the traditional brazilian rhythms adapted to a drum set.
• AudioBus and inter-app support to stream live audio directly to other apps.
• Universal app: works on iPhone, iPod and iPad.