Results of Multiformat at 128kbps public Listening Test
What's the best audio codec? A detailed listening test by a small group of people was done at this website and the results are represented in easy to read graphs.
How to interpret the plots: Each plot is drawn with the five codecs on the x axis and the ratings given (1.0 through 5.0) on the y axis. N is the number of listeners used to compute the means (average ratings) and 95% confidence intervals. The mean rating given to each codec is indicted by the middle point of each vertical line segment, and the value is printed next to it. Each vertical line segment represents the 95% confidence interval (using ANOVA analysis) for each codec.