Vocoder

Vocoder history   The vocoder (voice coder) derives from work in the telecommunications field to compress the human voice for more efficient transmitting over the telephone line. Bell Labs, among other companies, was working on vocoder technology back in 1950`s....

Time Stretching

What is time stretching?   Time stretching is a digital process which is altering the perceived passage of time in an audio signal without of intention of modifying its spectral characteristics, such as changing its pitch for example. Implementing generalized...