Wait. Do you know how many effects you can pull off in stereo phase shifting? There's a lot.I'm wondering, speculating that you are out for a long pass swirling shift.
Ed is right in that there is no cancellation audible in discrete stereo phase shifting although technically a cancellation of either the phased or dry signal could randomly occur. The thing is though, while your ears are traveling with the frequency sweep and traveling to you from two discrete sources, you would not detect the cancellation of sound but rather seem like the sound just met each other for a second with one channel seeming for a split second to be substancially louder than the other.
To contrare, you would get a great effect from adding a phase shifter to the other side. Keep it discrete though as much as possible for the best result. You'll find the effect quite amazing actually as the effect will seem to be "thrown over" from side to side yet still be coming from each channel.
Hey pedals aren't too bad! True, they're noisy as hell but were talking about a phase shift here, so without the noise it would sound closer to a rubberband like flange effect.
The direct answer to your post is:
Yes. Lexicon makes quite a few stereo proccessors with phase shifting.
The toughest sounding phase shift I ever heard in my life came out of a pedal though!
That pedal was made by Elecktroharmonics and the model was their top of the line unit around 1977 called Badstone. I will take four of them please. yeah right...be lucky as hell if I could only find one of them working.
A spelling correction. Sheese. I'm so anal sometimes! LOL
[This message has been edited by MORPH! (edited 04-28-2005).]