Besides the bit rate of an encoded piece of audio, the quality of MP3 files also depends on the quality of the encoder itself, and the difficulty of the signal being encoded. As the MP3 standard allows quite a bit of freedom with encoding algorithms, different encoders may feature quite different quality, even with identical bit rates. As an example, in a public listening test featuring two different MP3 encoders at about 128 kbit/s, one scored 3.66 on a 1–5 scale, while the other scored only 2.22. COUNT 5
QSN1 Other than the bit rate and the difficulty of the signal, what can also affect the quality of an MP3 file? ANS1 quality of the encoder QSN2 The MP3 standard allows encoders to have a lot of freedom with which aspect of encoding? ANS2 encoding algorithms QSN3 As a result of the freedom, different encoders can result in different quality even if which aspect of the file is the same? ANS3 bit rates QSN4 An example shown has a low range quality score of what value? ANS4 2.22 QSN5 To compare qualities, sound files are evaluated on a scale that ranges from 1 to what? ANS5 5