Parallel and Stereo Processing on the Quad Cortex

[@elotro100]

Thank you, very good. Among other things I was not aware of the fact that you loose the stereo effect in front of mono blocks. 🙂

[@davlavmusic7070]

Frankly, I wasn't sure how it would behave until I tried all the parameters. I think its something that Neural should change. I realize the amps are mono in real life, but there's no reason that amps can't maintain the integrity of the stereo signal - its software. I realize that's different than in real life but it would be an improvement, IMO.

[@elotro100]

@@davlavmusic7070 I dont know if the AxeFx, the Boss GT-1000 or the Helix maintain the Stereo Signal...Anyway I agree and I think the QC should be updated in this direction.

[@davehubner5300]

Good piece. I usually run two amps in stereo to FOH at house. I use the first two lines on the QC for amps cabs compression and dirt pedals, then run time based effects in the second two lines on the QC often in parallel w chorus etc, multiple delays and reverb.. I usually pan my cabs about 2/3rds to get the separation. I also use hi low cuts prior to the outputs so I can adjust levels on the two channels. This weekend I'm running a Vox and Lonestar, but depending on the song I will use Plexis, Matchless etc. The QC is simply amazing, I used to lug a huge pedalboard and a Matchless head to church and now I carry my rig in a backpack, it's more versatile and sounds awesome

[@jamieolsen4353]

Great Vid!! I finally understand how to set up stereo presets and run a stereo effects loop.

[@davlavmusic7070]

Glad it helped!

[@brandonprescott5525]

This is great information! Your series of tone walkthroughs and now this video are helping me get more interesting sounds out of my QC. Thank you very much! I would be interested in even more sound design tutorials with the QC. Even basic things like signal chain orders, why one would place one effect in a chain somewhere, beginner approaches to tweaking amp settings, anything along those lines will have my eyes and my likes. Again, thank you!

[@raelit1]

Davlav good job! Thank you very much! I really appreciated🙏👏👏👏

[@megadupe8648]

Thanks so much! Please keep up the great videos on the QC. So appreciated!

[@malborotre]

Grazie video utilissimo. Grazie a te mi si è aperto un mondo

[@IgorMuller]

Actually it was a pretty informative video, thank you!

[@MrVyrtuoso]

The crossover is for splitting a mono source signal over two bands split at whatever crossover frequency set. One such routine use is for bass, where using a crossover the low frequency part of the split path say below 500Hz is to be processed with compressor and EQ only, whiule the high frequency part of the split path above 500Hz is to be processed with distortion going into an amp and cab, all in order to produce that more modern distorted bass tone. It's also useful for guitar where you wanna send lower frequencies that contain the fundamental to trigger a synth block, while the high frequency path gets regular guitar treatment.

[@davlavmusic7070]

Yeah, I figured that out eventually. Sometimes it takes a while. kzbin.info/www/bejne/qKWUo3aNgcmZhpY

[@purpandicular]

Thanks, great video! Please keep them coming

[@EricEdwards1]

That's a great video man! Subbed.

[@davlavmusic7070]

Thanks for the sub!

[@pino_7428]

Thanks for this explanation I really need it ✌🏻

[@BrianVallotton]

Great work Dave! I shared this on the forum. I have never seen it explained this well. I will use this as a reference as I try some of this stuff on my own. I must admit I am not very proficient with things yet. That is what happens when you are lazy and just use other people's presets! Hehe.

[@davlavmusic7070]

It can all be overwhelming with all the options. Frankly, one of the reason I do these videos is because it forces me to dig in to everything. Thanks for promoting my videos on the forum, I really appreciate your support.

[@BrianVallotton]

@@davlavmusic7070 It's my pleasure Dave. You really deserve the attention and I am sure you are providing a great service to the community there. The forum is not really active with many interchanges. There are a few people there I do interact with on a regular basis though. It is amazing how many people may look at a video or see your comments with not even so much as a response. I know this is not a new phenomenon. You can see in your analytics for this page. I quit all social media, but I do like engaging on KZbin like this and in the various forums. Less trolling! Okay, I yakked at you enough for one day! Have a great one.

[@legzalez]

very useful video, thanks!

[@davlavmusic7070]

Glad it was helpful!

[@SAmfp2p]

use the crossover for bass presets. compress the lows and let them rather clean. and for the upper side distort the top

[@davlavmusic7070]

Thanks! I did figure that out eventually: kzbin.info/www/bejne/qKWUo3aNgcmZhpY

[@davidrundmc]

great video thanks!

[@davlavmusic7070]

Glad you liked it!

[@spinaltap22]

You'd use a crossover to separate out lows and highs. Eg; crossover at ~250Hz, send anything below that to a cleaner amp (bass amp?), and anything above to a distorted amp. Keeps the lows from getting muddied up with distortion, but keeps them in the signal to fill it out. Well worth experimenting with!

[@davlavmusic7070]

Thanks, I'll play around with that.

[@spinaltap22]

​@@davlavmusic7070 It can be sensitive to exact frequency (I pulled 250Hz out of the air, you'll need to sweep to find a good one, I used to use a Boredbrain Transmutron that didn't have values on the dial...), and especially sensitive to the blend. However, if you dial it correctly, you can get some incredible results.

[@thierrylejeune5164]

Nice ! Thanks !

[@fikardam]

thank you SIR !!!

[@davlavmusic7070]

Most welcome!

[@philipbrister]

Subscribed

[@davlavmusic7070]

Thanks. Hope you find all the videos helpful.

[@philipbrister]

@@davlavmusic7070 I’d be lost without them.

[@Rattlehead522]

Stereo cabinets were added in update 2.1.0 just a month after this was uploaded, how do they change the routing?

[@davlavmusic7070]

The amps are still mono, so the stereo cabs only change it slightly. If you are running two amps in parallel, you can merge them before the cab block and use a stereo cab instead of using two different cab blocks. Might save a little CPU that way.

[@Takis_Playloud]

Hello and thank you for the videos, very informative for a new QC user like me. I'm coming from fractal ax8 (LOVE IT). In ax8 there is a block called "enhancer" that you usually put at the end of the path for a pseudo "dual guitar" effect. I'm the only electric guitar in the band and that sounded great live. Do you thing is there any way to re create that on QC? (not with chorus). Thanks

[@davlavmusic7070]

There's not really that kind of doubling effect on the QC. There's a few options to mimic that - you can use some of the time delay on IRs, fine pitch shifts, or even a dual delay (which is what I used on my Guthrie Govan patch video). I'll put together a video going over these options.

[@davlavmusic7070]

I just put up a video on this if you want to check it out.

[@ant1738]

An unrelated comment to the current video .. #1 .. On the guy who keeps requesting the Van Halen Tone Preset #2 .. How to smooth out the guitar Tone's harshness for live direct To PA sound . Is there a general parametric setting or equalizer setting .. I realize its predicated on amps and cabs .. global eq? Thanks

[@davlavmusic7070]

There is a global EQ, but I'll admit I haven't ever used it. If I'm trying to smooth out some high-end harshness I always use the low-hi Cut Filter.

[@TheAtheistworld]

So the parallel path replaces the second lane? That is the second lane is gone. So u can do the same with the fourth lane so it becomes the parallel path for the third lane? Right? Cheers bro ❤

[@davlavmusic7070]

Yes. And remember that's how the cpu is allocated as well. Path 1 and 2 share a processor and 3 and 4 share one.

[@TheAtheistworld]

@@davlavmusic7070 great. Thnx

[@ant1738]

The ping pong delay trick is a great litmus test ... So running stereo cabs, Is in the mono cablock there's a pan feature ... But that is not stereo .. Unless you placed a stereo effect after the monocab block even if the Mics are panned ?? Or 2 separate cabs?

[@davlavmusic7070]

If you put the delay after the amp and before the cab and then hard pan the mics on the cab you will get the stereo effect. But if its in front of the amp it will negate the stereo even if you have the mics panned.

[@ant1738]

Thank you

[@ShreddingTomato]

So I have a patch that I want to run dual amps with scenes where one is clean and the other is distorted. I have my distorted scene on row 1 and I have that output going to row 3 which is where my clean amp and effects are. I turn everything on and off the way that I want it and when I try to switch from one scene to another the amp doesn’t switch. What did I do wrong?

[@davlavmusic7070]

Hard to say. Can you share the preset on the Cortex Cloud so I can look at it? Easiest way is to just make it public and then send me your ID.

[@Eidosgod]

Can there be a Multi Tap Stereo delay? To run 8 channels of delay simultaneusly (4L and 4R) and each channel or delay have modulation capabilities? If I get this gear I want to do Allan Holdworth delay based chorus. (Or what a Yamaha UD delay Chorus like) Also Boss DD-500 can do it.

[@davlavmusic7070]

I tried something like that when I created a preset for Holdsworth tones: kzbin.info/www/bejne/fnS7kmWqfKx-apo

[@Eidosgod]

@@davlavmusic7070 Nice! Its seems that there is a huge void of Holdsworth presets and Arquetipe in Neural knowledge base page. You will be really appreciated there if you upload the preset.

[@Pierluca72]

Nice tutorial. What if I set the output to a mono output, like output 3 for example, and let's say that i have a stereo effect on the line. Would the output be a sum of the stereo in mono or would it be only one of the stereo channel? I am asking this in the case I would like to have a stereo sound to output on the PA from output 1 and 2 and at the same time I would like to monitor from a speaker in mono from output 3 (for example I don't want to carry two speakers but I still would like to have a stereo sound at the front of the house)? Thanks in advance

[@davlavmusic7070]

As long as you choose the the output from the mono list (i.e. you're not sending the output to 3/4 and just using the 3 line), it will push the stereo signal back to mono. For example, I just tested the ping pong delay going out mono Output 1. When I did I got all the delay pings just in one channel.

[@Pierluca72]

@@davlavmusic7070 thanks

[@RogerThat2021]

Hey man, I’m a little confused about how to get a stereo amp preset happening . I used to have a chain of effects that ended with stereo delay and reverb going into 2 amps L/R. Not sure how to do this in QC? Any advise ?

[@davlavmusic7070]

You do the same thing on the QC. Split the path, putting an amp on each. Make sure you set your splitter stereo string to "Split" and that you pan the A/B on the mixer to L/R when you mix back together.

[@RogerThat2021]

Thanks for the reply . Do you have such a preset already made?

[@davlavmusic7070]

@@RogerThat2021 Try this one: cloud.neuraldsp.com/cloud/p/0028bdb3-372c-48a1-9335-0ada20f0a8b7

[@RogerThat2021]

@@davlavmusic7070 thanks for this . Will each amp be on its own output? E.g 1 amp on 1 and 2 on 2 etc. I trying to create a way of giving front of house each amp to manage .

[@davlavmusic7070]

@RogerThat2021 you can do it that way if you want. Just attach the mixer to the output on the 2nd line. Then set the outputs on each line to 1 & 2, respectively.

[@pleoband]

I'm using 4 amps 2 each side. How can I add a ping pong delay? How can I solve phasing issues?

[@davlavmusic7070]

So, you've got 2 amps on the left and two others on the right? All 4 running at the same time?

[@pleoband]

@@davlavmusic7070 Yes and I space tem apart using delay on the left side.

[@davlavmusic7070]

@@pleoband It's hard for me to say without seeing the preset. But for phase issues you have two option - there's the phase inversion on the Merge. There's also one on the Gain block (in the Utility group).

[@davlavmusic7070]

@@pleoband For ping pong, I'm assuming to get 4 amps in parallel you are running separate inputs into line 1 and line 3. If that's the case then there's no way that I can think of to put a delay in front of both. Again, hard to say when I can't see the preset. If you want to share it with me on the Cortex Cloud I can look at it.