Thanks, so what would a starting point look like?
It looks like you are waaaay over thinking this. start with 1 phaser plug something into the IN(s). now, take the OUT(s) and plug into mixer. Have you played with a phaser effect before? Feedback knob will make effect more intense⌠The more stages there are, the more intense the effect is (but different). Turn the knobs, let your ears hear what things do
Now start playing with CV
So back to basics for starters then, thanks for your time. Never used a real phaser, only virtual ones- starting with vsts and VCV now.
Iâd say definitely - get a feel for what things do, otherwise when you go nuts with the CV (which I very much encourage), you will better know what is going on
You are definitely over-thinking this! I donât know much about the Bi-Phase but it looks like itâs just two searate channels of phaser that can be swept independently. So all you need is two phaser modules, one on each channel of your stereo output. Unless Iâm missing something? Personally Iâd use filters, Squinkyâs Stairway (one of my favourites!) has a phaser mode, and so does the X-FX one, which has more resonance. Then you can modulate the cutoff differently on each channel for a nice wide stereo image. Obviously standard phasers are swept with an LFO, but something random like Caudal is more interesting, or try an envelope follower instead. Want multi-stage? Just connect your sound to more filters. Personally Iâd start with 8-FO and four Stairways on each channel, probably in parallel and mixed together. That would let you control the phase difference between the channels, if thatâs important. Then you can go nuts and try modulating the resonance, adding feedback or randomness, separate delays on each phaser voice etc. Infinite possibilities really.
@Squinky your suggestion of just picking a phaser module and using two of them is obviously the easiest way of doing this! Surge, Nysthi and Ericâs one are all really good. I do like to patch my own effects from scratch though, itâs kind of satisfying and you learn a bit about how these things work. One of my favourite patches was a DIY chorus/flange using 24 Fundamental delay modules, but then again I donât get out much. 
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Well, there is over thinking and under thinking. Looking at the picture, there is one thing that the biphase does that you absolutely cannot do with any two phasers. It looks like it has a sync mode where one goes up while the other one goes down. To do this you really need to do something.
Thatâs why I suggested (or tried do) using two phasers that can use an external CV for the phase, and then build your own modulation source - in this case at least an LFO and in inverter. And I donât know which phasers will take an external CV for phase - thatâs not a standard thing. That why Frozen Wasteland came to mine, although Iâm sure there are others.
Hello Squinky was the following patch what you had in mind-only a rough sketch!
Using two of your Stairway Filters in Phaser mode. Does the Inverter/LFO set up look ok?
True, thatâs why I thought of using filters in phaser mode, then you can directly control it with CV using the cutoff. I think you can pick two outputs 180 degrees out of phase on 8FO, that would make one channel rise while the other one falls. Two BPM LFOs synced to the same clock could do it too. Never noticed you can CV the sweep on Frozen Wastelandâs module, Iâll have to give that a try. Personally, I like stereo effects where the channels are unsyncâd, but guessing if you wanted to faithfully recreate the original pedal it should be fairly simple.
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Yes, I think so. I donât think Stairway (nice as it is!) will give exactly the classic phasing sound.
You really think Iâd have a parameter that wasnât CV controllable? 
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So what Module would work, any of yours or back to phasers? FW âJust a phaserâ or any set of phasers with CV inputs. Just looked, the XFX Filter does not have a phaser option.
I thought it sounded fairly similar. Just out of interest, whatâs the phaser mode doing âunder the hoodâ?
Yeah it does, you might have to look through all the options. I think itâs under the ladder filter, canât remember off the top of my head!
Whoops it does, under the Ladder option, right at the bottom -Ladder Phaser. 
Iâll give that option a try as well.
Thanks
I donât actually remember. this is one of those modes I stole from a different filter, and thatâs what they called it. I vaguely remember these phaser thing were sometimes a combination of an allpass phase shift and something else, like a lowpass.
The Bogaudio Ranalyzer is really good for looking at filter responses, btw. I used it to design F2 Filter.
Me again, I have the Mu-tron user manual:> see what you think would work in VCV Rack for those different options/combinations if you would be so kind [has you always are anyway] :
Bi-Phase-Owners-Manual-Complete.pdf (2.7 MB)
Is there a reason you are focused on this specific phasor? Just wondering since by your own admission, you havenât heard that many of them.
I know Squinky will come up with a solution, but in the mean time there are tons of options (that in many ways are even more powerful) to explore
My guess - itâs is a very famous device, original ones are extraordinarily expensive. The modulation and control set is something that almost no single off the shelf module/plugin can do. Unlike the various mxr, overheim, EH stomps.
Well I am reading a book about Jamaican Dub music and there was a chapter on Lee âScratchâ Perry and his use of this pedal on drums and all sorts of sound, so that piqued my interest. I always like a challenge and the chase to achieve the end is more thrilling than the actual final finished item. It is all a learning experience. Squinky knows so much about so many things, he is so versatile and all knowing.
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I donât know everything! I certinaly donât know how to make a good biphase. The one I made in 2004 was terrible. Luckily my boss was on leave, so I donât think anyone ever heard it.