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In Reply to: Re: Binaural delay and harmonic delay posted by tomservo on November 3, 2002 at 13:08:06:
Hi Tom,With the DSP filtering I do, I get flat magnitude and linear phase response from 40Hz up to 22kHz. I do the all-pass filtering separately from the minimum-phase filtering so I can easily try with and without phase distortion. On loud percussive sounds, it is most definitely audible--the only way to describe it is it sounds real. Everything is significantly "punchier". Sometimes I get an involuntary startled reaction from sounds I know are coming. I don't get that when the phase is wrong. On non-percussive sounds, though, I really can't tell a difference. That's really not so surprising since non-percussive sounds tend to be narrow band.
Anyone who says phase is not audible does not understand human hearing. Our ears are highly non-linear devices. In a non-linear system, phase affects magnitude--so even if we don't hear phase directly, we will hear it indirectly through magnitude. The impact of the ear's non-linearity will be greatest for loud percussive sounds, so it is not so surprising to me that that is exactly the circumstances under which I notice the difference--and I came up with this theory after I noticed this effect, not before.
But then again, maybe I am emotionally tied to this work as well...John
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Follow Ups
- audibility of phase distortion - hancock 10:53:47 11/04/02 (0)
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