REC

 

 

The red light is the visual sign to highlight something underway. In recording studios, it is also the sign that imposes silence because of the recording process.

 

 

Signal, noun 1. An action, movement, or sound that gives information, a message, or an order. 2. Something that conveys notice or warning. 3. An act, event, or the like that causes, incites some action or marks their beginning.

 

 

 

 

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