Originally Posted by therock
but if they are less than 30ms that's less than 1°, If I flip the polarity, now
they will be 179° out of phase. So I guess I should reword the question.
is less than 1° noticeable? can some people hear comb filtering at his interval? I can't hear it
You can't directly convert miliseconds to degrees, because phase shift is frequency dependent.
At 44.100 Hz sampling, you could theoretically hear phase shift caused by 1 sample delay, but you might not hear it on electric guitar, because filtering happens at a very high frequency, which is may not be produced by the amplifier.
You won't hear 1° phase shift, but 1° at 10 kHz is way less than 30 ms.