Abstract: A motion picture film capable of reproducing the sound field full of ambience in the reproducing system. The digital sound tracks 5L and 5R, on which digital audio data have been recorded, are recorded so that temporally same digital audio signals are recorded with a spatial shift by a preset distance along the film running direction.

Abstract: A motion picture film capable of reproducing the sound field full of ambience in the reproducing system. The digital sound tracks 5L and 5R, on which digital audio data have been recorded, are recorded so that temporally same digital audio signals are recorded with a spatial shift by a preset distance along the film running direction.

Abstract: A signal monitor apparatus displays an envelope image of an audio signal together with an image of a related video signal on a picture screen of a monitor. When applied to a system including a plurality of signal sources and corresponding systems, the signal monitor apparatus can monitor the whole system as a whole and therefore the operator can reliably monitor abnormalities, such as a wire break or other trouble. This signal monitor apparatus comprises signal sources, an A/D converter (14) for converting audio signals from the signal sources into digital signals, a decimation filter (15) and a rounder (16) for compressing timebases of the outputs from the A/D converter (14), a data converter (17), a RAM (18), a timing controller (19) and a video circuit (21) for converting the compressed outputs into video signals, a video mixer (23) for mixing original video signals and the converted audio signal converted into a video signal and a monitor (24) for displaying a mixed output.