2min chapter

99% Invisible cover image

Bleep!

99% Invisible

CHAPTER

The Broadcast Audio Delay Changed Radio Forever

Broadcast audio delay allows a board operator to cut out a swear word without using the bleat button. For years, live radio used the bleap sound effect, but they stopped in the 19 seventies. Most of the time you didn't need bleak - it was just a tone to fill dead air while the naughtiness went away.

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