Re: Newbie questions
Re: Newbie questions
- Subject: Re: Newbie questions
- From: tahome izwah <email@hidden>
- Date: Mon, 6 Apr 2009 08:53:08 +0200
2009/4/6 Brian Willoughby <email@hidden>:
> Exactly what I am saying. A phase shift is a delay, albeit a
> frequency-dependent delay. Polarity inversion involves no delay at all.
Correct.
> This whole discussion started when I pointed out that "180-degree phase
> shift is misleading" because it implies a delay. "Polarity inversion" is
> 100% clear and accurate, thus not misleading.
Yes, albeit a delay doesn't change the actual signal properties so you
could argue that the net effect is the same.
> BTW. Tahome's suggestion for a pseudo-stereo "edge" mix is not compatible
> with industry standards for stereo. It won't survive a mono mixdown because
> that would result in silence. This "edges of the stereo field" is actually
> just inverting the one resulting channel and putting it in the other. Many
> really cheezy guitar pedals do this, and it's fine for cheap stereo because
> it will fool the human brain, but it's not really recommended to use such a
> signal because combining channels destroys the audio (not just the vocal,
> but all of the audio). Might be fine for iPhone, though, but if your users
> attach any monophonic output device, such as particular BlueTooth speakers,
> earpieces, or headphones, then it won't work.
"Won't work" isn't exactly how I would put it. He wants the stereo
field sans the center channel in order to suppress the vocals (this is
how I read his original question). This is exactly what you get, no
matter if you mix it down to mono or not.
For a mono signal this would indeed result in silence but this isn't
what he is doing.
Also, there is no such thing as a fully mono compatible stereo center
channel suppression, no matter how you approach the problem.
--th
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