![]() ![]() ![]() The voice encryption possibilities offered by the vocoder were used to conceal messages sent by the US military to their soldiers and allies during World War II.ĭecades later, Robert Moog and Wendy Carlos built a vocoder coupled with a Moog synthesizer that introduced a new voice into music. The speech is electronically recreated by modulating a carrier signal (white noise or a synth tone) with a filter based on the incoming voice’s tonal characteristics. Today we associate it with robotic vocals in music, but it was originally designed as a speech coding tool by Bell Labs in the 1920s to reduce the bandwidth and improve the travel distance of voice messages.Ī vocoder works by splitting an incoming audio signal (a human voice) into multiple frequency bands, then creating a signature of this signal based on it’s frequency and amplitude content. ![]()
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