abx test-flac vs. mp3 320 crb, mp3 320 (fake?) test Options

[pixote]

hi
i m new here on this forum
i ve heard a little about the abx blind test
i must say that i don t know much about such things
my music is in flac format and i convert that flac in foobar to mp3 320kbps cbr,
can someone explain me how and where i can make a test where i can see if there s a diference in sound between
flac and mp3 320 cbr (converted form the same flac)
and i want to ask you something else: i have a lot music in mp3 320 from the net, is it possible that i test that music somehow if it is fake mp3 320kbps (someone could convert it from 128 to 320 and upload that on the net as 320kbps)
?
thanks in advance for answering me

[db1989]

Select the two tracks (e.g. the uncompressed WAV and the compressed MP3), right-click, and choose the option to ABX.

Yes, the p-value is the probability of achieving the same results by selecting randomly/guessing. Thus, to be confident that you did identify a difference between the tracks, p must be low. The usual significance level is p<0.05; that is, a less than 5% chance of achieving the same test results by guessing. (This is standard throughout the sciences.) So, if you achieve a p-value of more than 0.05 (what do people do with a p of exactly 0.05, btw?), it means that your test has less power to indicate an actual difference.