a "sample" is a single measurement of amplitude.Ī sample may also be referred to as a.Word length in images determines the number of possible colours a pixel can be.Īlthough it is common to use the word " sample" to refer to a complete sound (perhaps a piano note or drum break/loop), in digital theory. Word length (accuracy of each measurement of amplitude).Sample rate is to audio what ppi or dpi is to images. Sample rate (number of measurements of amplitude per second).There are 2 important parameters which control the quality of the audio conversion process. Number of colours in the images palette (determined by word length)Ĭreating a good quality digital audio signal depends on 2 similar parameters.Number of pixels per inch (ppi resolution).Accuracy of the positioning of the dotsĪll image designers know that quality of an image depends on 2 factors also. ![]() Quality in a join-the-dots picture depends on. Remember join-the-dot pictures? To produce a good image you must have sufficient dots to capture the detail of the shape AND the dots must be positioned accurately. What is an audio analogue to digital converter? Join the dot pictures NOTE: Make sure you are familiar with basic sound theory before reading this article. In this way, a mathematical "picture" of the shape of the wave is created. Audio analogue to digital converters work by repeatedly measuring the amplitude (volume) of an incoming electrical pressure soundwave (an electrical voltage), and outputting these measurements as a long list of binary bytes.
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