Rotary Improvement

We need a better rotary, I was using the strymon mobius before and this is the only modulation that I just can’t use because it sounds SO bad. Please improve it!!!

Hi Filipe, i’m Gustavo from instagram (seu fã dos shows do PC Baruk…rsrs Board grande…), i have the same problem. This effect is very digital in the Quad Cortex. Please Neural, help us!


@coimbrafilipe - Hey! It might be helpful if you elaborate on why you think this effect needs improvement. Making a thread stating “this is so bad I can’t use it” doesn’t really help anything. If we were to update it based on this thread, how would we know what to change?

I will keep this thread open if you can update your description to the sound/function you would like to have that you don’t think is there at the moment.

Also please email into to see if they can give you some tips on how you can get a more desired result to your ear in the meantime. Thanks!


Hey man, didn’t mean to sound rude or something.
It just sounds more like a vibrato than a true leslie, you know?
I don’t know how else to explain it. I can send you some sound samples comparing it.


You’re good! I just wanted to communicate that being descriptive on why you find it “bad” would be helpful so if this is a feature that is worked on the team will know what the community is looking for. I think other community members will be more likely to vote on your feature too if you can describe it.

You’re welcomed to upload some SoundCloud links to what you’re looking for vs what result you’re currently getting.


I am a Leslie nut, that Doppler effect is magic with guitar, organ, voice etc., i got a few Leslies, a huge 147, a 16, got pedals, 2 Neo Ventilators, a Strymon Mobius, EH Lester G, and QC, i got a Amplitube Leslie software, that one comes closest to the real deal i.m.o. , Neo not bad, the rest is meh, the QC Leslie is not on par with it’s other effects, it does not take rocket science to compare, like the Leslie was an after thought, therefore the Neo is the only pedal i use with QC, i hope you don’t take this as an offence but to get it better and i’m confident you can.


Yeah, I can’t really offer a detailed description, but as much as I love my QC, the rotary effect is unusable for me in it’s current state. To me it’s like it bogs down or degrades the signal instead of making it a larger sound the way a rotary cab does. I wish I could put it into words better, sorry.

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If anyone wants to provide sound clips to what they’re looking for vs what they’re getting from their QC that would probably be a good start!

I LOVE the rotary feature in the Boss MD-500 Modulation pedal.

Sounds great, it adds extra drive/grit if you want it to, and you can even set it to ramp the rate from slow to fast and vice versa (and you can control the rate of the ramping itself).

I would love to see this get implemented “better” in the QC. Busy holiday month, but I’ll try to remember to post some sound samples of the Boss’s rotary.


I think that some pedals are good start, if you want have sound idea:

Electro-Harmonix Lester G Deluxe Rotary Speaker Pedal

Strymon Lex / Strymon Mobius

Neo Instruments Ventilator II

I’m not a specialist in this effect, but I think that is import start comparing with this pedals (maybe we have better petals to use ) the sound and the controls too…Because is important we have de necessary controls

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RotoSIM Leslie Rotary
Leslie Pedal

I tried to emulate my Leslie 147, the sound is there but stationary, the rotation is the problem, has something to do with delay and maybe phasing, i have not the skills or the knowledge how to do that, fortunately i’m not dependant on QC for Leslie sound but i love to see it getting better.

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Good Leslie tones are found all over classic rock. Here’s a few examples:

Fast forward about 5 minutes into the song

That should get you started. There are many more examples out there.

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Here are two examples that I find useful in terms of what I would hope for in a good rotary for QC, both in terms of features as well as tonal examples:

And especially around 3:30:

Both the Lex and the Pinwheel have different, but wonderful drive circuits with clear overtones and a richness/thickness that’s so great. The Pinwheel especially addresses and maintains the unaffected guitar tone and adds to it, rather than imposing its own personality on the guitar.

The Strymon really nails the ranges for speed and rates of acceleration for the horn and bass speakers separately, and the counter-rotating directions are really evident in the panning and Doppler of the sound. The asymmetry of the mic placements (sounds like back and side, not left and right symmetrically) really adds to the realism here. Also, having control over the perceived mic distance is really valuable, though personally I would always have the control cranked for maximum panoramic width and close detail.


From the other thread titled “Rotary Speaker Artifacts” I liked jamsden’s idea here of using two rotary blocks. I took this one step further and divided a dedicated L and R horn on parallel paths and then as jamsden described, another parallel path for the bass speaker with a different acceleration time.

It’s not a revelation, but it does sound better than the basic rotary block to my ears. If anyone wants to check it out and offer some feedback I put them up in the cloud. Go to jamtagg and look for Dbl Rotary and Triple_Rotary. Different versions and one with rising degrees of saturation to add a bit of that fuzzy edge like I hear in some organs (think John Medeski ,or Jesse Gibbons from Schleigho). Check 'em out and enjoy!

One note, and most of you have probably figured this out by now…you can’t assign the speed parameter of the rotary block to a footswitch on the QC. I have a note in with them to address this in a future update. The way around it os to assign one of your external inputs (expression or footswitch). You’ll have to do that for all of the rotary blocks individually, and make sure they all start on either slow or fast collectively, but it works.

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I finally recorded the samples comparing mobius with the quad cortex.
Quad cortex sounds more like a vibrato.


Yeah, it’s interesting. Ive found most of the QC’s effects to be good to excellent, leaning way toward excellent (love the reverbs). The rotary is the one exception. It just doesn’t sound like a rotary speaker to me. The comb filtering is so deep and the frequency balance changes so drastically, I just can’t use it. A mix control for the dry signal might help. I know I could put it in another lane with EQ and side chain it but that creates other logistical complications. Fortunately, the Univibe model is quite good.

Coming from a Helix. I hated their Leslie’s. So I used a Neo. I find the QC version more to my liking. But I use it in parallel to blend in 50/50 with dry signal. I have to reverse the phase and 3db of gain afterwards, but it works to my liking. If they would just put a dry mix knob on the block with phase inverter it would be much easier.

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I ended up buying a Lex. I use a rotary effect all the time and I can not get the QC version to sound the way I want.

Yes the rotary in the Boss GT-1000 or the Strymon Mobius are fantastic. I would love to see the rotary improve on the QC too. A clean blend would add a significant improvement and would be easy to implement i think.