MP3 player audio performance is discussed including measurements of frequency response, phase response, crosstalk, distortion, sampling rate errors, jitter, and maximum sound pressure level with headphones. In order to make these measurements, several measurement techniques and algorithms are presented to overcome some of the challenges of testing MP3 players. We discuss test equipment requirements, selection of test signals and the effects of the encoding on these test signals. A new method for measuring non-coherent distortion using any test signal including music is also presented.
Authors: Steve Temme, Pascal Brunet and Zachary Rimkunas
Presented at the 122nd AES Convention, Vienna, 2007