AE's Nebula thread (samples, tests, etc)

definetly.. so just to get things straight:

We should now be looking for the best template that emulates a cabinet. We should wonder: What should be in the template, kernel's etc. And have a think about that? what do we want to include? dynamics, saturation, etc and how do we achieve this using Nebula?

Or am I completely missing the point here with this post? :p IMO, get the best template possible and we should be hammering in some improvement..
 
Definitely not as drastic as my experiences so far. I picked which Nebula was btw, it's still a bit more present up on those higher freqs which is telltale now.

It must be Nebula 2 then? It can't fuckin deal with the cab sampling or something...

Still, even with Neb 3, it's got that nasty fizz going on. The low mids don't feel as dense either... though it does seem to feel more fluid and dynamic... the bottom especially seems to respond more like real cab flub whereas the impulse just booms out like a tard.

It feels like Nebula has everything right apart from the frequency response. The impulse is still almost more pleasant to listen to, despite feeling more 2d and distant.
 
Moonlapse said:
Definitely not as drastic as my experiences so far. I picked which Nebula was btw, it's still a bit more present up on those higher freqs which is telltale now.

It must be Nebula 2 then? It can't fuckin deal with the cab sampling or something...

Still, even with Neb 3, it's got that nasty fizz going on. The low mids don't feel as dense either... though it does seem to feel more fluid and dynamic... the bottom especially seems to respond more like real cab flub whereas the impulse just booms out like a tard.

It feels like Nebula has everything right apart from the frequency response. The impulse is still almost more pleasant to listen to, despite feeling more 2d and distant.
Click to expand...

+1, same observations here.

I even did match the clips with curve eq and it is almost a 100% match eq-wise.

noarin, do you have neb 2 also? can you add that clip with neb 2 in the chain so we can hear if there are differences between nebula 2 and 3? that would be ace!
 
I don't have Neb 2, but do you want me to post the pre-amp out track so you can process it and we can compare?
 
almost a 100% eq match ey? then we should be looking at the other kernels/options like saturation.. harmonics.. etc?
 
He's actually in the process of comparing Neb 2 to 3 to impulse right now... should be interesting...

I agree regarding the other options. I dare say it's something related to harmonic structure or distortion being added. It's always this high fizz... not very musical. Might be in relation to the kernels.. I don't know... I don't know how Nebula operates!
 
neither do I hehe.. but I guess these templates are involved in how much (kernels) harmonic structure or added distortion it emulates and such; which would explain why the clean cabinet would sound different than a clean reverb template, etc. so then it's just a matter of creating an excellent template for cab emulation..

any thoughts or explanation on this perhaps Francesco? :) I'm just guessing about..
 
Francesco recently loaded up 4 different templates he made just for cabs.

As much as I respect that, I think I'd rather just try to zero in on ONE template that replicates the cab as accurately as possible with this software.
 
Well, I think he was giving us a few options to experiment with, and see which is best ;) I'll try to get crackin' this weekend!
 
Yes, i'm providing different templates so as that you can decide which is better for you considering dynamic behaviour, harmonic distorsions and CPU usage.

For example you can decide to use the clean not dynamic template, it's like an impulse response very low cpu usage.

Or you can decide to sample also the dynamic behaviour and the 3 harmonic distortion kernels and you get a more CPU usage.

Or better you can try to achieve the best compromise considering the 3 parameters.
 
well let's shoot for the best one and see where we'll hit!

awesome..

what exactly are the 3 harmonic distortion kernels? can you explain a bit about that? :)
Can't wait to hear the differences..!
 
Yes, it'll be really interesting to see which of the approaches turns out most authentic. Once we get a few going, I might get a dual rec or 6505 back in here and do some reamping to see how far it can be pushed.
 
They are very small differences, but they exists. In general any analog or digital gear is not perfectly linear. They add distortions, very low or very high distortions.

You can sample the linear behaviour, not dynamic, with impulse responses, but you can't sample the dynamic behaviour or the harmonic distortions with impulse responses. The only mathematical way to do it is to use our technology (Vectorial Volterra Kernels Technology).

When you connect your cabinet and your microphone to your PC try to send in output a sine wave for example at 1Khz. You can generate it with Wavelab for example.

You will discover that the registered sine is composed not only by the 1Khz sine but also by sine wave at multiple of 1 Khz. So very attenuated sine wave at 2Khz, 3 Khz and more will appear. You have to use a very accurate frequency spectrum to see them.

These are harmonic distortion kernels and the only way to sample them on the entire spectrum (1Hz->22000Hz) is with Nat.
 
Acusticaudio.net said:
Yes, i'm providing different templates so as that you can decide which is better for you considering dynamic behaviour, harmonic distorsions and CPU usage.

For example you can decide to use the clean not dynamic template, it's like an impulse response very low cpu usage.

Or you can decide to sample also the dynamic behaviour and the 3 harmonic distortion kernels and you get a more CPU usage.

Or better you can try to achieve the best compromise considering the 3 parameters.
Click to expand...

Francesco, first of all thank you for all your help!
The thing is... we really just want results that get to a real cab as close as possible. I feel like all those templates are a bit like shooting in random directions. I know there are tons of options to look into but I for once would exclude any non-dynamic templates and such right from the start.

A cab isn't non-dynamic so we can savely ditch any impulse-like approach.
So far Nebula is inferior to impulses as far as the overall fizzyness and bottom end is to be considered and superior to impulses in terms of dynamicness, frequency response and overall harmonic vibe.

The fizz is really annoying and seems to be present within all that upper harmonic content, so a simple LP filter won't do the trick. On the other hand, the bottom end is lacking some content whereas the impulses sound a bit thicker there.

Anyone jump in and correct me if I'm mistaken.

Last but not least I still believe that Nat/Nebula is the way to go but we still are somewhat kept in the dark in terms of what we would have to look into to get a more realistic emulation of a mic'ed cab.

Just my 2c.
 
And do the number of kernels correspond to the harmonic order, like 2nd, 3rd harmonics etc.?

That's the sort of thing we're all after. We want something that will model non-linear behaviour to hopefully get us closer to that sound of cabinets, with speaker distortion, power amp saturation... some feeling of movement with the tone. The normal impulse responses are too static for our purposes.
 
Yes the number of kernels corresponds to that. You can get until 10 kernels. So you can sample the cabinet distortion but not the power amp saturation (for now).

When you are going to sample it's better if you keep the drive parameter of your power amp at very low level.
 
From what I understand the chain only runs through the amp's power section, so the drive or pre-gain stages have no effect on the tone. Unless of course you're referring to not running the power amp's master volume very loud?

I think for us we just want maximum quality just to see what this is capable of before we start scaling down the CPU usage. It's more like setting a benchmark first and then afterward finding a usable compromise. The biggest issues at the moment are 1) that high-end fizz and 2)... well... the fizz.
 
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