RevDrucifer
Fractal Fanatic
9 pages in and no bugs reported. I think I'm going to take a stab at my first beta.
Anxious to dig on this stuff! Thanks, Cliff!
Anxious to dig on this stuff! Thanks, Cliff!
Any idea what the usage was for the BB Pre in 12.14?Table of CPU usage per drive type in v13 Beta.
Box o'Crunch and the Riot family record the highest CPU usage.
If you're low on CPU, it pays off to check out alternatives for diode-based drive types. Like a fuzz, cranked SDD Preamp, Tube Drive or FET Boost.
BB Pre: 9.1
Bender Fuzz: 2.7
Bit Crusher: 3.9
Blackglass B7K: 2.8
Blues OD: 9.2
Box o’Crunch: 9.4
Esoteric ACB: 9.1
Esoteric RCB: 9.1
Eternal Love: 9.1
FAS Boost: 9.1
FAS LED-Drive: 9.1
FET Boost: 2.6
FET Preamp: 2.6
Face Fuzz: 3.9
Fat Rat: 9.2
Full OD: 9.1
Hard Fuzz: 2.5
Heartpedal 11: 9.1
Jam Ray: 9.1
M-Zone Distortion: 9.3
Master Fuzz: 3.9
Micro Boost: 2.6
Mid Boost: 3.8
OD 250 / Gray: 9.1
Octave Distortion: 2.8
PI Fuzz: 3.9
Plus Distortion: 9.1
Precise Drive: 9.1
Rat Distortion: 9.1
SDD Preamp: 2.6
Shimmer Drive: 3.9
Shred Distortion: 9.3
Suhr Riot (all): 9.4
Super OD: 9.1
T808 Mod: 9.1
T808 OD: 9.1
TS9DX +: 9.1
Tape Distortion: 3.8
Timothy (all): 9.1
Tone of Kings: 9.2
Treble Boost: 3.8
Tube Drive 3-knob: 3.3
Tube Drive 4-knob: 3.3
Zen Master: 9.1
9 pages in and no bugs reported. I think I'm going to take a stab at my first beta.
Anxious to dig on this stuff! Thanks, Cliff!
After reading the release notes for firmware 13 I am starting to believe that the man in this video is Cliff from when he came up with the idea for the Axe FX 3 watch the whole thing!!
As an engineer, I deeply appreciate you sharing technical info like this. I do not work directly in DSP; but can appreciate a lot of the info you provide here and the insight into what is going on under the hood is pretty fascinating.An explicit solution is one where the output does not depend on itself, i.e.
V = f(Vin)
An iterative implicit solution is where you have to iterate an equation to get the result. For example consider a hypothetical component where the current is a function of the voltage. I.e.
I = f(V)
In a series circuit with a resistor the voltage across the device would be
V = Vin - I*R = Vin - f(V)*R
Let's say the function is I = V^2
So then
V = Vin - V^2 * R
V is on both sides of the equation. One way to solve this is using Newton's method (x = x - f(x)/f'(x)). But that takes a lot of time because you have to keep iterating until the error is below some desired value. You also have to use the derivative which adds computations. The other problem is stability/convergence. Sometimes the solution "blows up" and doesn't converge. This is unacceptable in a real-time system.
A resistor in series with a diode results in an equation with an exponential (or log) function that needs to be solved along with its derivative.
Now when you add a capacitor in parallel with the diode you complicate things even further because now you have a nonlinear ordinary differential equation (ODE). So the current is not only a function of the voltage, the voltage has "memory" due to the capacitor. Solving these types of networks is extremely time consuming. Things like SPICE use implicit solutions like Runge-Kutta 4 (RK4).
I've been working on this for a while and came up with a semi-explicit solution that doesn't require iteration, has the accuracy of implicit solutions and is nearly as fast as explicit solutions.
This is a graph of a 1K resistor in series with a diode. The blue trace is the reference and was derived by solving the network using Newton's method. The red trace is the semi-explicit solution. If you can't see the blue trace that's because the red trace is nearly exactly on top of it.
View attachment 71052
On the Axe-Fx III solving the network using Newton's method uses over 30% CPU. The semi-explicit method is around 6%.
6%Any idea what the usage was for the BB Pre in 12.14?
9 pages in and no bugs reported ...
Was noticing the same thing.
Looking at the schematic for the Pinnacle it's nothing like a Crunchbox. It's a FET-based amp-in-a-box pedal. Three gain stages with a tone stack.
Be prudent… Do your back up ... lol
I know we all have different taste, but I got stuck on the Jam Ray for over an hour into a clean Marshall tone. Gain on 6, dropped some bass and man did it sound great! I hardly use pedals and get the gain from the amps. But I may rethink some presets, because just this pedal alone convinced me to use some pedals.