Q: Am I only the one having 1.5kHz and 3kHz rogue freq?

Quad Cortex
41

There seems to be a whistle/buzz at intervals of 1500 Hz, with 3000 being the loudest.

42

Here is my previous feedback made about my preset: Q: Am I only the one having 1.5kHz and 3kHz rogue freq? - #10 by sledge76

43

Thanks for confirmation feedback. You are the first person having the same issue. It means there could be more similar cases?
However, there is a slight difference. My device has 1.5 kHz as the loudest noise peak and 3 kHz as the second loudest. So I understood 3 kHz noise as the 2nd harmonics of 1.5 kHz.

44

I’ve emailed Neural Support with a video (that they requested) showing the noise and how it goes away with cuts to 1500 and 3000 Hz. I’ll post back with their response.

Making modest EQ cuts with very narrow Q at 1500, 3000, 4500, and 6000 helps without seeming to make much noticeable impact on the tone, but it’s obviously seem than ideal.

The cross over noise gate posted above is interesting. I have to run the cross over much higher than 700, otherwise the tone gets super dark when rolling down the volume knob.

1 Like
45

@sledge76 Try a buffer in front of the Quad Cortex. That seems to remove the 3000hz whine that I hear.

Here is a silly clip of me turning on and off a buffer, and I hear the whine disappear when the buffer is on
https://m.youtube.com/watch?v=_21W7bBqa9c

1 Like
46

You are not the only one, buddy. Speaking on high gain captures and PA/Inear (Desktop monitors are completely different on response), all around 4khz is TRASH. If you make a wide strong cut on 4khz and you on/off it you will hear how much crap are in there. I am still having a battle with this. The part without IR for my poweramp+cab sounds amazing with only a “modest” narrower cut on 4khz. But for PA and specially inear, those high frequencies are a pain in the ass. I tried TONS of IR, using eq after the IR…and still not 100% comfortable using inears. If i rolloff the highs i need to go until 5-6 khz, but then it sounds very dark. I feel the Q for the rolloff is too much radical. The last thing i am trying is using the software cabinetron. It has lots of options and the eq is more tweakable than the eq on the qc. I used the “tone match” function after all the taming i could do using the intro for “Firepower” of Judas Priest as it is only guitar with no “harmful” highs. I will test it later on the rehearsal room. Wish me luck :joy:

47

4k is a notorious frequency in electric guitars that gets cut slightly even with real amps for mixing

1 Like
48

I think different people are talking about different things in here.

Sledge76 I think was talking about the video that I posted: the Quad Cortex has a whine at intervals of 1500Hz even when nothing is playing. It goes away if you use a buffered pedal in front of the QC (as demonstrated in my video). Oddly, the Nano Cortex does NOT have this whine (using the same captures) and is quiet without a buffer.

Other people in here seem to be complaining about the crackling artifacts as notes decay. That’s definitely a thing also with the QC. Not sure it’s as noticeable in the Nano using the same captures, but I’ve not done A/B testing.

And others seem to be complaining about midrange content of the tone while playing. That seems like a totally different issue, probably down to the EQ and miking technique.

49

You are right, a lot of different things here that point to the biggest weakness of the QC: The noises

Didn’t tried the nano but if with the same capture you don’t have same issues it’s something not normal. I hope it’s not hardware related and at some point the QC can become quieter. :crossed_fingers: