I am not too sure where I should post this question, and hence I am sorry if this causes any inconvenience
. With the quality audio files, one can either measures it subjectively or objectively. With subjective approach, it would just involves listening tests with participation from as many people as possible, but I am not too sure what sort of things and calculations would be involved if I am to do objective measurements on audio files. Hence, I would like to know if there are some sort of links or documents or tutorials available on how one would be able to do objective measurements on audio quality. I believe that there are quite a few different measurements but I do not know where I can find tutorials on these methods. Could anyone advise me on this matter? Thank you very much for taking your time to read this.
. It's also been used occasionally on and off for other type of test over the year's many which I don't remember. Somebody else can give you more information about it seeing that I am not quite that familiar with it. It involves some sort of ODG measurement 
. You might need to do a search. I don't know how accurate the results are though.