<P> The broadcast profanity delay was invented by C. Frank Cordaro (July 13, 1919 - February 20, 1997) who was Chief Engineer of WKAP, originally on AM 1320, in Allentown, Pennsylvania, during the 1950s and early 1960s . Ogden Davies, then General Manager of WKAP, assigned Cordaro the task to develop a device whereby profanity during a "live" conversation could be deleted by the radio talk show host before it was broadcast . This new device was to be used on the Open Mic radio talk show . The device Cordaro developed was the first tape delay system . WKAP was one of several stations owned by the Rahal brothers of West Virginia (later Rahal Communications). First tested and used at WKAP, this tape system for broadcast profanity delay was then installed at the other Rahal - owned radio stations . From the Rahal brothers' stations, the broadcast profanity delay went into common usage throughout the US . </P> <P> John Nebel, who began a pioneering radio talk show in New York City in 1954, was one of the early users of a tape delay system as was talk show pioneer Jerry Williams at WMEX in Boston in the late 1950s . </P> <P> In 1977, the capacity of RAM (random - access memory) had reached 16 kb (kilobits) per chip, enough to think about using computerized digital audio means to create a sufficient delay for content deletion . By storing audio digitally, it was possible to move a "virtual tape head" along recorded audio . Eventide, Inc. created the first digital broadcast delay for this purpose . The device (known colloquially as a "dump box") had a large "DUMP" / "DELAY DUMP" button that would bring the delay to zero, thus removing unwanted segments . In addition to this convenience, it would also "rebuild" the delay time by unnoticeably lengthening the normal pauses in spoken material . Thus, a minute or so later, the broadcaster would again have full delay, often leaving the listener unaware that material had been deleted . </P> <P> In modern systems, a profanity delay can be a software module manually operated by a broadcast technician that puts a short delay (usually thirty seconds) into the broadcast of live content . This gives the broadcaster time to censor the audio (and video) feed . This can be accomplished by cutting directly to a non-delayed feed, essentially jumping past the undesired moment (something that can be quite jarring to a viewer or listener). In other cases, dedicated hardware units similar to the original digital unit but with improved quality and editing capability can be used . These products can even "build up" delay with difficult program material such as music . Alternatively, a bleep noise or other substitute sound can be inserted . This is more difficult to do with live content, however, and more often appears on recorded material . </P>

How does the dump button work on radio
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