Document Type and Number:
Japanese Patent JPS50113232
Kind Code:
A
Abstract:
A film projector is provided with means for simultaneous playback of at least two sound tracks whereby the volume or intensity of one of the sound tracks is applied to control the volume or intensity of the other sound track without causing partial or complete erasure of the recorded sound. The volume or intensity of one of the sound tracks may be varied inversely to the volume of the other sound track thereby permitting two separate acoustical information patterns recorded on the tracks to be simultaneously heard while one or the other of the tracks is softened or decreased in volume intensity when the concurrently played track is to have its volume heightened.
Application Number:
JP12451874A
Publication Date:
September 05, 1975
Filing Date:
October 30, 1974
Export Citation:
International Classes:
G03B31/00; G03B31/02; (IPC1-7): G03B31/00
Domestic Patent References:
| JP49132817B |