Need help with my Recto Amp Sim

@ xmortumx: I didn't pay attention of the volume compare to other sims. I just try to match the volume of the different channels and modes. I'll cramk it up in the final release. Thanks for the heads up.

@ Matt : You know, I'm not just a developer, I used to play... when I had time. About the name, I agree that "impulse compensation" is more appropriate but I called it "resonance" for two reasons:
1- I didn't want to have to go through all the above detail explanation... but I did !!! Anyway.
2- It actually acts on the resonance frequency range of the speaker/cabinet and, as there is already amps with that kind of control, I said to myself that users will readily have an idea of the purpose on that control.
 
I fucking jizzed my pants when you said that you ordered an iMac.
I will definately pay / donate for a Mac version of your ampsims. I never tried them myself but judging from what I've heard, they're awesome.
 
What is included in an IR ? The frequency response of the power amp, the speaker/cabinet and the mic. What if the IR has been captured using a tube power amp with no (or just a little amount of) negative feedback ? It will have that big bottom characteristic of the speaker/cabinet resonance. And what if the speaker/cabinet/power tube interaction is already modeled in the amp sim? The end result is gonna be a big uncontrollable bottom.

Do you see what the problem was and why I add to implement the resonance knob to control the low end ?

ThanK u LePOu:loco:
 
Seriously… I’m not an electric/electronic guy so I maybe wrong on some points but… anyway.
From what I have understood through my readings on tube power amp, as the load of the power amp tubes are the speakers (via the output transformer), they (the tubes) will react according the speaker/cabinet impedance. And this impedance varies as a function of the frequency in that kind of way.
http://www.acoustics.hut.fi/dafx08/papers/dafx08_17.pdf
The actual gain of the power tubes is related to the load they are connected to, and the bigger the load the higher the gain. So without negative feedback, the frequency response of the power amp is gonna be more or less similar to the frequency dependence of the speaker/cabinet impedance. Negative feedback tends to flatten the output by taking back to the input of the power amp an inverted portion of the output signal.

If we go back to the Recto, the main difference between the vintage and modern mode is the absence of negative feedback on the modern mode, so a not flattened frequency response. From a simulation point of view, if one wants to model the difference between these two modes, a load as to be modelled and connected to the power tubes. Simlpe. That's what I did in LeCto.

Now we need to add a speaker/cabinet simulation after the amp sim. The preferred choice is to use an IR. What is included in an IR ? The frequency response of the power amp, the speaker/cabinet and the mic. What if the IR has been captured using a tube power amp with no (or just a little amount of) negative feedback ? It will have that big bottom characteristic of the speaker/cabinet resonance. And what if the speaker/cabinet/power tube interaction is already modeled in the amp sim? The end result is gonna be a big uncontrollable bottom.

Do you see what the problem was and why I add to implement the resonance knob to control the low end ?

Hope I don't talk bullshit !!!

Plain amazing. Thanks for the kickass work you put on this!
 
How much ? :D

Hey Brandon, I have a scoop for you.
Earlier this week I was working on song on my old PC and got sick of all the glitches and crackles I got as soon as my project has more than 4 or 5 tracks...
So I decided to get myself a better computer, dedicated to making music. I ordered an iMac. So I will definitely port some of my plugins to mac in the future.

I would marry you if you also released your plugins for mac! Seriously, i have not heard any better amp simulators then your releases
 
How much ? :D

Hey Brandon, I have a scoop for you.
Earlier this week I was working on song on my old PC and got sick of all the glitches and crackles I got as soon as my project has more than 4 or 5 tracks...
So I decided to get myself a better computer, dedicated to making music. I ordered an iMac. So I will definitely port some of my plugins to mac in the future.

:OMG: :hotjump: :kickass: :worship: :worship: :worship: :worship:
 
How much ? :D

Hey Brandon, I have a scoop for you.
Earlier this week I was working on song on my old PC and got sick of all the glitches and crackles I got as soon as my project has more than 4 or 5 tracks...
So I decided to get myself a better computer, dedicated to making music. I ordered an iMac. So I will definitely port some of my plugins to mac in the future.


if you need help let me know. I'm a noob about XCode and objective c but I have some interest about mac programming!!!
I have downloaded the VST 2.4 SDK today... let's start from 2.4 then I think I'm gonna study 3.0
I guess it won't so much difficult to setup a project and just build it on a mac.
I need some source code to play around and build on my mac mini!

cheers
 
Just read through this. Awesome work......really. Will donate as soon as Mac Version is out :D