Helix (Native) IR loader

[Sogradde]

Hey,

 

I recently came across a problem concerning the IR loader within Helix Native (and possibly the physical versions as well) and I need some input on that.

 

So I usually use third party IRs for my sound. Up until now it was mostly Own Hammer IRs and some others. A few weeks ago I bought a cab sim from Getgood Drums, which I use as a VST but it also comes with the option to export any cab setup as an IR. However, when I load these IRs into the Helix IR block, they sound all thin and fizzy. I first thought it had something to do with the quality of the exports but it turns out that external IR loader VSTs don't add that fizzyness to the IRs (I used NadIR in this case).

 

It's not only audible but very visible in graphical EQs. As you can see in the attatchment, there is a very present notch in the 15k-20k range in the original impulses, which disappears using the Helix IR block. There are also more subtle changes all around the EQ band but they are hard to see, it's easier to hear the difference.

 

So, what's going on here? I figure it must have something to do with the way the Helix imports impulses into their file format but how exactly does it work and is there a way to fix this? I have not tested it with my LT yet because it's at our rehearsal spacebut I assume the problem will be the same.

 

Cheers

[Schmalle]

Look at the exported IRs in the time domain (amplitude over time graph instead of amplitude over frequency) and see if they need to be truncated. In other word: is there silence at the start of those IRs?

[Sogradde]

On 3/24/2024 at 10:03 PM, Schmalle said:

Look at the exported IRs in the time domain (amplitude over time graph instead of amplitude over frequency) and see if they need to be truncated. In other word: is there silence at the start of those IRs?

 

Thanks for your reply. I attatched a screenshot of the IRs I normally use (top) with the exported one from GGD (bottom). It doesn't look like there's actually something to truncate. However, you can clearly see the difference in sample rate and for some reason the GGD exports are in stereo. Converting them into mono does not solve the issue though.

 

[Schmalle]

Das sieht gut aus, aber probier' mal Export mit 48kHz - das ist die Samplerate vom Helix.

Nebenbei: Die Sache spielt sich bei 15kHz und drüber ab, ich könnte das nicht hören - und ich bezweifel stark, dass das den Sound dünn und fizzy macht.

[Sogradde]

On 3/24/2024 at 10:47 PM, Schmalle said:

Das sieht gut aus, aber probier' mal Export mit 48kHz - das ist die Samplerate vom Helix.

Nebenbei: Die Sache spielt sich bei 15kHz und drüber ab, ich könnte das nicht hören - und ich bezweifel stark, dass das den Sound dünn und fizzy macht.

 

Hör's dir gern selber an, ich finde den Unterschied schon doll:

https://www.dropbox.com/scl/fi/649etv74stwpog36nz1hf/IR-AB.wav?rlkey=an3pltdx96u2mfbznrj6ehs2u&dl=0

 

Leider hat der Export in 48kHz nichts gebracht. Ich bin ehrlich gesagt ein bisschen ratlos.

[Schmalle]

Das kann ich definitiv hören.

 

Hast du einen weiteren IR-Loader als "dritte Meinung"?

Könnte es sein, dass bei NadIR ein HighCut bei 20kHz an ist?

 

Wenn du im Helix den HighCut im IR Block auf 20kHz (höchster Wert) stellst, dann sollte es ziemlich gleich klingen.