Audio

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Audio

Post  admin on Tue 20 Jul 2010, 7:58 am

In Multimedia, the sampling rate of audio data is the number of measurements taken every second when converting analogue sound into digital. The measurements describe when combined display the shape of a wave and contain both amplitude (volume) and wavelength (pitch or note) information. The higher the sampling rate (more samples taken), the higher the accuracy of the digitised sound. The following figure should help as a visual aid:


Example A shows a low sampling rate, while example B shows a high sampling rate.

Another detail needed to be taken in account of sampling rate is the bit resolution. The bit resolution in relation to audio data is the amount of data bits per sample. A sound sample can be stored as either an 8-bit or a 16-bit binary number. 16-bit has a higher quality than 8-bit, but requires double the storage space.

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