But it is the processing of sound signals that we will look at in this article. These range from recognizing your voice when you say “OK Siri” to monitoring the temperature or color in safety equipment. This signaled the birth of sound processing, which would go on to contribute to the development of digital signal processing or DSP.ĭigital signal processing covers a wide range of functions. He then had complete control over how much reverberant vocals he would use in his mix. He then placed another microphone into the centre of the hall to pick up the echoing vocal which fed back into his mixing console, adjusted by a fader, and the mic in the hall was then moved around to alter the nature of the echo. So, he put the vocalist back into the booth and placed a speaker in the hall, which played an amplified feed from the singer’s microphone. First, he tried putting the vocalist in the hall next door, but the hall was too reverberant. He was struggling to get the voice to sound natural and decided it needed some echo. His issue was that his tape recorder only had two tracks to record onto, and one of them was taken up by the band. Many years ago, an engineer in a recording studio in Memphis, Tennessee was recording vocals to a song. This means that when it is converted back into real life analog signal, it has changed desirably. So, what is Digital Signal Processing? DSP audio takes an analog signal such as the electrical pulse from a microphone, converts it into digital data, and then applies mathematical equations to it.
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