The use of lossy compression is designed to greatly reduce the amount of data required to represent the audio recording and still sound like a faithful reproduction of the original uncompressed audio for most listeners. An MP3 file that is created using the setting of 128 kbit/s will result in a file that is about 1/11 the size of the CD file created from the original audio source (44,100 samples per second × 16 bits per sample × 2 channels = 1,411,200 bit/s; MP3 compressed at 128 kbit/s: 128,000 bit/s [1 k = 1,000, not 1024, because it is a bit rate]. Ratio: 1,411,200/128,000 = 11.025). An MP3 file can also be constructed at higher or lower bit rates, with higher or lower resulting quality.
What kind of compression is used?
created
An MP3 file that is created using the setting of 128 kbit/s will result in a file that is about 1/11 the size of the CD file created from the original audio source (44,100 samples per second × 16 bits per sample × 2 channels = 1,411,200 bit/s; MP3 compressed at 128 kbit/s: 128,000 bit/s [1 k = 1,000, not 1024, because it is a bit rate].
An MPthree file that is created using the setting of one hundred twenty-eight kbit/s will result in a file that is about one/eleven the size of the CD file created from the original audio source (forty-four thousand, one hundred samples per second x sixteen bits per sample x two channels = one million, four hundred eleven thousand, two hundred bit/s; MPthree compressed at one hundred twenty-eight kbit/s: one hundred twenty-eight thousand bit/s [one k = one thousand, not ten twenty-four, because it is a bit rate].
What kind of compression is used?