BOPEC also has mixing and blending capabilities for its stored fuels. He analyzed the effects of mixing and juxtaposing material pigments. Color theory studies color mixing and color combinations. Serial compression is a technique used in sound recording and mixing. It received two Oscar nominations for Best Sound Mixing and Best Visual Effects. This allows for turbulent mixing of the two layers. He performed minimal audio mixing and dubbing. This ensures no mixing of the two fluids occurs. Suga is responsible for writing, composing, arranging, mixing, and mastering his material. Vallen is credited with the songwriting, guitars, production, audio engineering, mixing and mastering. Students were having difficulty adjusting to the mixing of ethnicity in the classroom. The band were not usually present for the stereo mixing sessions. The Media Plane controls the audio and video mixing and streaming. Concrete has a limited lifespan between batching / mixing and curing. An alternative to a machine is mixing concrete by hand.