Recording signals to tape at a high level, causing a mild distortion or tape saturation to occur, used as an effect. Hot can also refer to the conductor in a mic cable which has a positive voltage on it at the moment sound pressure moves the diaphragm inward. Hot is also used to describe a chassis or circuit that has a potentially harmful voltage on it.
HOT
Meaning of HOT in English
Guitar English glossary. Английский словарь гитарных терминов . 2012