caixa de expressão
1. An enclosed chamber in a pipe organ containing pipes whose volume can be controlled by a pedal-operated shutter or louvers to create dynamic expression effects
The organist used the swell box pedal to gradually increase the volume during the crescendo passage.
O organista usou o pedal da caixa de expressão para aumentar gradualmente o volume durante a passagem crescente.
2. The manual (keyboard) of an organ that controls the pipes within the swell box
She played a beautiful melody on the swell box manual while working the pedal.
Ela tocou uma bela melodia no manual da caixa de expressão enquanto acionava o pedal.
The swell box is a fundamental feature of pipe organs used in concert halls, churches, and cathedrals. It represents an important innovation in organ design that allows organists to create dynamic expression similar to other orchestral instruments. This term is predominantly used in classical and sacred music contexts, and knowledge of it is essential for organists and organ enthusiasts worldwide.
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