What is an analogue signal?, Information in the form of continuous varying data is an analogue signal, What is sampling?, Sampling is the process that converts analogue sound into discrete digital data that can be stored in a computer., What factors affect the audio quality of digital sound?, Sampling rate, bit depth and bit rate, What is a sampling rate?, The sampling rate is the number of samples taken per second., What is the unit for measuring a sampling rate?, Hertz (Hz), True or false: The higher the sampling rate, the higher the sound detail., True, What is bit depth?, Bit depth is the number of bits available for each sample., What values does a CD represent?, CD can represent values from 0 to 65535(216 -1)., What is PCM?, PCM is the process for digitising a sound file and creating an uncompressed file., What is a bit rate?, Bit rate is the number of bits of data used to store data sampled every second., How is the bit rate calculated?, Bit rate=Sampling rate × bit depth × channels, What unit is used to calculate the bit rate?, The unit for bit rate is kilobits per second (kbps)., True or False: The more the bit rate the lesser the quality., False. The more the bit rate the better the quality., Why is the audio quality of a music CD better than downloading from Internet?, The bit rate of a music CD is higher than downloading from Internet, True or False: The more the bit rate the higher the file size., True., How is a file size of an audio file calculated?, File size (bits) =bit rate× number of seconds, What is the bit depth of a CD?, 16 bits, What is the bit depth of a DVD?, 24 bits.

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