qwerty42

Ah ok, I understand what you're trying to achieve now. Another thing to try, rather than a phase flip, is the Simple Delay. Put it on one of your paths, set mix to 100% and feedback to 0%, and then adjust the delay in milliseconds. If your issue is a slight phase shift (eg due to pickup location) rather than a phase flip, this can get them aligned in phase :)

There's a block in the volume category (the stereo one) called Stereo Width, if I recall correctly. It has a phase invert option. That said, be careful with this approach. If you're taking two similar signals which are exactly in-phase and then flipping one of them, you're likely to get some significant cancellation once the signals recombine, whether that's in Helix or in the air from stereo monitors...

This is odd and suggests to me that something else is going on, because the default (Auto setting) impedance for most of the Helix amps, as far as I'm aware, is 1MOhm. Adjusting the impedance should only make them darker, because you can only go lower from 1MOhm. 1MOhm input impedance gives you the brightest tone vs. lower values. Are you making this assessment with nothing else in the chain? If not, pedals in front of the amp could be adjusting the impedance lower. There's a new Global setting in v3.0 which is "First Active" for the auto-impedance functionality, meaning if you bypass all your blocks in front of the Amp block, the Helix input will switch to the input impedance for the amp as if you were plugged straight into it. You also need to make sure that "Guitar In-Z" is set to "Auto" in your input block for this to work.

If all you want is a small phase offset, which is what you're hearing from the DAW monitoring, you can do this quite easily with the stereo Dual Delay or even the Simple Delay blocks. Set the feedback to 0, the mix to 100%, and dial in however much delay you want on the channel you want. You can either use these as stereo blocks, or split your path and apply the delay to only one of those paths (e.g. to offset a dual amp or dual cab setup). Also pay attention to how you have your channels panned to adjust the stereo field width (there is actually a stereo width volume block that lets you tweak this, too). I think it's fairly self explanatory once you start playing with these things, but if you want I can make some example patches. A word of caution here: if you do this, it's best to dial in the offset with different amps/cabs/effects on the L/R channels. If you simply add the phase offset but the signal is otherwise identical, you can get phase cancellation issues on mono playback or even stereo speakers. I always check how my stereo patches sound by collapsing them to mono with a mono gain block at the end, which you can bypass to go back to stereo. It should sound good in mono too... If it doesn't, adjustments are needed somewhere.

of course!

Depending on your signal chain, you can sometimes hear a noise from the impedance circuit switching, but I'm pretty sure it's not done via a mechanical relay. (if I'm wrong, please feel free to mock me relentlessly). It's an analog circuit, but it's probably being switched via transistor/mosfet or similar, without any actual moving parts. The sound is just an artifact of the switchover which comes through in the audio signal. The larger the jump when the circuit switches, the louder the artifact, in my experience. So you're both right. Sorta. Close enough? ;)

wut

You might want to try my suggestion above next time. Could be your issue too. No guarantees, but maybe.

Here's how you can know for sure: Buy all of the Helix Rack units everywhere you can find them, until they are completely out of stock, forcing Line6 to manufacture more Wait until they come back into stock Buy 1 more. That one will have been manufactured in the time between step 1 and now

Make sure HX Edit is logged-in to your account first, before you try the update. If it isn't, it'll start the process, download the update, and then just hang there, doing nothing. Line6 definitely needs to fix this snag.

Hmmm... I just watched this to see what you were referring to, and that is very interesting! I'm going to have to play with those two amps and see what's going on there. Looks like I could definitely be wrong about the stock cabs/mics always playing nice together without phasing issues. He doesn't have anything else in his chain prior to that which might be causing a phase shift, so it has to be either the amps or the cabs. Thanks for sharing this and pointing that out. At any rate, the fix would still be the same, using a delay just like Jason did. I don't know of any other way to adjust phase offsets with Helix (but maybe I'm wrong there too!)

Yeah, I think OP has the right idea, it's just that the cabs and mics in Helix don't respond the way they would in real life, where distance would definitely affect phase alignment. (If they did, I can just imagine all the posts we'd get about 'when I use stereo cabs everything sounds thin and quiet!') But if he's getting some undesirable phase behavior from other parts of his chain, then using the delay trick mentioned above is a way to accomplish the same thing as moving the mics would. The only time I've ever had to do this was when I was using two IRs that hadn't been trimmed correctly, but maybe there are other ways to create phase problems in Helix that I just haven't discovered yet... (using the effects loops in a parallel path would be one possibility!)

Tuning might be irrelevant based on its implementation, but it still has to do pitch detection to isolate the discrete frequencies it is shifting by the desired intervals. It's far from trivial to do so. Also, have you tried the Poly Capo instead of the Poly Pitch block? I have only tried the former but it has an adjustable stability vs. speed setting. Might give you better results, or maybe it works exactly the same as the Poly Pitch. I don't know, just a thought.

I don't see that anywhere in this thread... And, I mean, considering the current state-of-the-art, it works pretty well, no? What out there works better, for realtime, low-latency processing, in a portable device? If you expect a digital pitch modulation to sound perfect and 100% transparent for this kind of purpose, I'm afraid you're still going to have to wait a number of years for that. I'm sure it will happen eventually, but it's the kind of thing that will probably require some clever machine learning algorithms to 'know' what perfect should and shouldn't sound like, to augment the already-highly-complicated process of frequency separation and individual note shifting for a combined set of notes. This is very challenging stuff in terms of how it's actually accomplished algorithmically.

FWIW, turning it up much louder with my crappy earbuds and listening more closely, I do hear the slight warbles now. But I also hear warbles just from the small dissonances in the first two bars, when the pitch block is still bypassed. What I'm hearing, personally (and I don't expect this to apply to everyone!) is that those 'normal' warbles that are due to the inherent dissonances of those notes are accentuated a little bit once the pitch block is engaged. And yes I also do hear it affecting the background note ringing out, if I intentionally focus on that. To my ear -- and again, I'm not saying this makes anyone else right or wrong, it's just my personal observation -- I don't think I would ever notice that in a mix. If anything, I'd assume it was just a very subtle chorus effect. I think this sound clip would make for a very interesting poll -- not meant to prove anyone right or wrong, but just to get an idea of people's average acuity for something like this. I think this might be like the blue/gold dress image and the laurel/yanny audio clip (if you're not familiar with either of those you should definitely look them up), where two people can hear entirely different things.