Wireless Audio Systems

Here is how this works in practice. Brazil's RF allocation differs materially from US and EU norms, so wireless audio planning here starts at ANATEL's frequency-licensing desk before it starts at the gear cart. The Brazilian 470–698 MHz TV-broadcast band is partially reallocated (700 MHz LTE has eaten the upper band the way it did in most countries), the 902–928 MHz ISM band is partially ready, and the 1.9 GHz DECT band carries production-comms traffic in São Paulo and Rio.

Here is how the picture comes together. On the ground, US-spec Lectrosonics SR / SRc, Wisycom MTK952, and Sennheiser Digital 6000 packs need to be re-blocked to Brazilian-cleared frequencies — we run that block-survey and ANATEL filing 15–30 days ahead of shoot date. Standard kits run Lectrosonics SRc + DCHR + DSQDe receivers with SMQV / SMDWB / DBSMD transmitters, Wisycom MCR54 + MTK952 + MTH400 stacks, and Sennheiser Digital 6000 EM 9046 + SK 6212 / SKM 6000 packs. Comm side runs Riedel Bolero standalone or Bolero-S MotorSport, Clear-Com FreeSpeak II / IV, and Comtek M-216 / PR-216 IFB.

Here is the short of it. The Brazilian RF environment is also one of the more challenging on the continent. Sambódromo Marquês de Sapucaí (Niemeyer 1984) Carnaval February delivers wall-to-wall RF saturation across 30+ live blocos plus broadcast trucks plus crowd cellular density. Lollapalooza Brasil at Autódromo Interlagos São Paulo (since 2012) and Rock in Rio (since 1985, 700K+ attendance) run dedicated RF planning across the entire festival site. F1 Interlagos São Paulo Grand Prix and Maracanã / Allianz Parque event work runs N+1 RF redundancy to FIA / CBF broadcast spec.

Here is what we have to work with. On the ground, Tropical humidity (80–95% Rio / Salvador / Recife / Manaus year-round) demands desiccant in each body-worn pack, IP-rated outdoor covers, and saltwater-rinse protocols after any coastal shoot. Maracatu, Frevo Pernambuco UNESCO 2012, Bossa Nova, Samba UNESCO Intangible, MPB heritage, and indigenous-language work across 305 peoples and 274 languages all run wireless capture through this stack. ANCINE sign-ups + CLT / FGTS 8% / 13º salário budgeted across freelance. FUNAI permits required before Terras Indígenas wireless work.