Does absolute phase matter? (not to be confused with wiring speakers out of phase with each other - see our Stereo Polarity Check).
Absolute phase means the preservation of signal phase all the way from microphone to loudspeaker, so that an instrument that sends a wave of positive pressure towards the audience/microphone is reproduced as a similar "push" from the loudspeaker (and the singer taking a deep breath, by the loudspeaker sucking in! ;-)
The audibility of preserving the absolute phase is a controversy that has rumbled on since the 1970s (an example here). You be the judge with this blind test!
These files present a monaural acoustic guitar riff, with its original and inverted polarity.
|Listen to [?] then vote — multiple guesses not allowed (your vote triggers a new draw)|
To pass a blind test, you will need to perform 10 trials at least, obtain a high score and reach a high confidence level: 95% is standard to rate statistical significance. It means that your score outperforms random guesses by 95%. There is still a probability that you just got lucky though, 5%. To reduce such probability to 1%, keep testing until you reached a confidence level of 99%.
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