Topic: Anyone got Voxengo PHA-979 phase rotation plugin & can process a few items 4 me?

[morst]

Would love to try this out on a couple sample shows before plunking down the ~ $80 USD

Can anyone process a few digital files for me by rolling phase 90 degrees on one channel?
I wanna mix mono SBD with mono AUD, in the M/S matrix style, and it seems like 90 degree rotation will enable me to avoid correlated bass build up on one channel of the output, as well as the opposite correlated bass cancellation on the other channel!?

Thanks in advance.
If nobody's got it, I'll probably take a chance, and at that point, would be willing to process a few items for others to test this.

Binaural Decoder may in part be doing something similar to the Mid/Side stuff, Ambisonics being formally extended Mid/Side essentially.  Your mention of the 60degree phase shift sounding right reminded me of something I read in the Q/A section of the Voxengo PHA-979 phase rotation plugin, which may or may not be relevant in this case-

"Q. PHA-979’s description says it can be used “to setup headphone monitoring so that it closer resembles sound stage produced by stereo speaker monitoring”.  That sounds interesting, but I don’t see how this functionality is implemented? A. A corresponding preset is available.  PHA-979 only models speaker phase positioning – 60 degrees phase difference between speakers.  It is not about time difference – the speakers are located at equal distances from the listener, so there is no delay between arrivals of signals from both speakers.  At the same time, phase difference between speakers is constant for all frequencies, it is equal to 60 degrees and it changes perception of the stereo field greatly."

https://www.voxengo.com/product/pha979/

[Gutbucket]

I do, and am happy to do so for you if I can. Currently working trade show until Monday. Also not sure the computer I have it loaded on is currently operational, but can check next week upon my return.

You may want to download and install the plugin to see if it does what you want. The Voxengo trial versions are fully functional and just insert a recurring beep. If you do, try a few other phase rotations in addition to 90 degrees to determine what works best for that show.  You can even use differeing anounts on the Side channel routed Left vs Right if helpful.

[Gutbucket]

Some example links posted in this tread- https://taperssection.com/index.php?topic=201100.0

Not exactly the same situation, but similar.

Also disussuon of it in this thead- https://taperssection.com/index.php?topic=130184.0

[morst]

I do, and am happy to do so for you if I can. Currently working trade show until Monday. Also not sure the computer I have it loaded on is currently operational, but can check next week upon my return.

You may want to download and install the plugin to see if it does what you want. The Voxengo trial versions are fully functional and just insert a recurring beep. If you do, try a few other phase rotations in addition to 90 degrees to determine what works best for that show.  You can even use differeing anounts on the Side channel routed Left vs Right if helpful.

My notion includes wanting total side channel cancellation when collapsed to mono, so I’m not inclined to process left differently than right other than the polarity reverse.


If you found that it runs, I’d like to have you process a track for me.
Happy to include the other SBD channel, so you can mess with it if that is of interest, or I can save space by only sending the isolated audience channel which I would like ”rolled.”


Thanks for the generous offer, and for all your fascinating research, experiences related, and info and audio you’ve long shared here.
You help make this site a valuable resource.

[Gutbucket]

Hey thanks. And same to you!

PM on its way in a few for the files.  Trade show now over, but heading out of town this afternoon for the weekend.  Will fire up the editing computer upon my return next week.

My notion includes wanting total side channel cancellation when collapsed to mono, so I’m not inclined to process left differently than right other than the polarity reverse.

Got it.  May not be helpful, but side channel will also fully cancel when collapsed to mono after any arbitrary rotation of the side channel, once its summed with its polarity flipped copy.  Its that polarity flip which causes full cancellation, regardless of the amount of phase rotation applied.  Same as flipping polarity without applying any phase rotation first.  So I might return to you a 90 degree rotated side channel and a few others, say rotated 30 degrees, 60 degrees, etc.  When collapsed to mono, bass cancellation on the side where phase was inverted, and reinforcement on the side where it was not will vary with the amount of rotation, which may or may not be useful.  Interesting to hear anyway.

That's different than applying a different phase rotation to each side channel copy which doesn't collectively sum to a full 180 degrees, which that plugin can also easily do and is the basis of the examples in that other thread. In that case the primary goal was better balanced stereo, yet secondarily didn't want the channel designated as "side" to fully cancel when collapsed to mono.

[morst]

Hey thanks. And same to you!

PM on its way in a few for the files.  Trade show now over, but heading out of town this afternoon for the weekend.  Will fire up the editing computer upon my return next week.

My notion includes wanting total side channel cancellation when collapsed to mono, so I’m not inclined to process left differently than right other than the polarity reverse.

Got it.  May not be helpful, but side channel will also fully cancel when collapsed to mono after any arbitrary rotation of the side channel, once its summed with its polarity flipped copy.  Its that polarity flip which causes full cancellation, regardless of the amount of phase rotation applied.  Same as flipping polarity without applying any phase rotation first.  So I might return to you a 90 degree rotated side channel and a few others, say rotated 30 degrees, 60 degrees, etc.  When collapsed to mono, bass cancellation on the side where phase was inverted, and reinforcement on the side where it was not will vary with the amount of rotation, which may or may not be useful.  Interesting to hear anyway.

That's different than applying a different phase rotation to each side channel copy which doesn't collectively sum to a full 180 degrees, which that plugin can also easily do and is the basis of the examples in that other thread. In that case the primary goal was better balanced stereo, yet secondarily didn't want the channel designated as "side" to fully cancel when collapsed to mono.

gotcha on the arbitrary roll.
Have a great week, this is not rush at all. I have a Little Women tape from fall 1990 and I'd like to redo my Dude of Life st louis 95 at high res.
This one is my old transfer, the mix collapses to SBD when played on mono gear.
https://archive.org/details/DudeOfLife1995-04-03


I have lots of recordings of my first band made this way, but would buy the plugin if I am gonna bother with em, rather than hassle you for a dead cover band.