According to Nyquist Sampling theorem the sampling frequency to produce the exact original waveform should be double the original frequency of the signal. The sample rate is measured in hertz(Hz). The bit depth may be 16-bit, 24-bit, 32-bit, for audio CD 16-bit is preferred. of bits in each sample, determines the maximum signal to noise ratio. The file size depends upon the sample frequency. The sample rate is also called as sample frequency, higher the sample frequency obtains a signal which is similar to original analog signal for good audio quality. A sample is a measurement of signal amplitude and it contains the information of the amplitude value of the signal waveform over a period of time. Sample Rate is the number of samples per unit time. For good quality music usually 64-128kbps(96kbps+ recommended) bit rate is preferred. Low bit rates refer to smaller file size and less bandwidth with a drop in audio quality. Higher the bit rate with more sampling rate, requires high bandwidth and produces good audio quality. of bits transmitted or received per second. Bit rate is no of bits (data) encoded per second or the no. It is measured in Kilobitspersec(kbps or k). It also depends on the ability of the encoder to get the important bits right.īit Rate refers to the audio quality of the stream. Audio quality depends upon the bit rate, sample rate, file format and encoded method. Audio Quality is the accuracy and enjoyability of the audio which the user can listen from an electronic device.
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