A
A/B: (1) Originally monitoring audio signals after or before tape. Now used as a term for comparing audio signals reproduced by different systems. (2) A cross fade technique between two selected sources.
A & B cutting: A method of assembling original film material in two separate rolls, allowing optical effects to be made by double printing. See also checkerboard cutting.
A-B roll: (1) A linear video editing process where alternate shots are replayed from two VTR sources through a vision mixer and recorded onto a third VTR. This speeds up the editing process and allows mixes and wipes to be made between the two source shots. (2) A dual film projection technique where silent film is projected via one film chain while another uses sound-on-film ...
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